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Unisex Lightweight 100% Cotton T-Shirts

Soft, breathable, and built for everyday wear. Shop unisex lightweight 100% cotton t-shirts that plant trees with every purchase.

Unisex Lightweight 100% Cotton T-Shirts

Soft, breathable, and built for everyday wear. Shop unisex lightweight 100% cotton t-shirts that plant trees with every purchase.

Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a trail winding past tall pine trees and rocks into the woods.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a trail winding past tall pine trees and rocks into the woods.
Into the Woods - Hiking - Lightweight 100% Cotton Unisex Crewneck

Into the Woods

from $35.99

Into the Woods from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink sketch of a common loon floating on water with a chick riding on its back.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink sketch of a common loon floating on water with a chick riding on its back.
Common Loon with Chick - Gavia immer - Lightweight 100% Cotton Unisex Crewneck

Common Loon with Chick

from $35.99

Common Loon with Chick from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a stand of tall pine trees, framed by the words Protect Our Forests, Preserve Old Growth.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a stand of tall pine trees, framed by the words Protect Our Forests, Preserve Old Growth.
Protect our Forests - Preserve Old Growth - Lightweight 100% Cotton Unisex Crewneck

Protect our Forests

from $35.99

Protect our Forests from $35.99
Leaf green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a smiling pygmy three-toed sloth hanging from a branch.
Leaf green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a smiling pygmy three-toed sloth hanging from a branch.
Pygmy Three-toed Sloth - Bradypus pygmaeus - Lightweight 100% Cotton Unisex Crewneck

Pygmy Three-toed Sloth

from $35.99

Pygmy Three-toed Sloth from $35.99
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black linocut-style illustration of a baby sea turtle with a patterned shell and ink splatters.
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black linocut-style illustration of a baby sea turtle with a patterned shell and ink splatters.
Baby Sea Turtle - Lightweight 100% Cotton Unisex Crewneck

Baby Sea Turtle

from $35.99

Baby Sea Turtle from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a full-color illustration of a ruby-throated hummingbird in flight.
Autumn lightweight cotton t-shirt laid flat, printed with a full-color illustration of a ruby-throated hummingbird in flight.
Vibrant Ruby-throated Hummingbird - Archilochus colubris - Lightweight 100% Cotton Unisex Crewneck

Vibrant Ruby-throated Hummingbird

from $35.99

Vibrant Ruby-throated Hummingbird from $35.99
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black ink line drawing of two coneflowers on tall stems.
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black ink line drawing of two coneflowers on tall stems.
Coneflower - Echinacea purpurea - Lightweight 100% Cotton Unisex Crewneck

Coneflower

from $35.99

Coneflower from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink wildflower bouquet with bees, framed by the words Save the Bees, Plant Native Species.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink wildflower bouquet with bees, framed by the words Save the Bees, Plant Native Species.
Save the Bees - Plant Native Species - Lightweight 100% Cotton Unisex Crewneck

Save the Bees

from $35.99

Save the Bees from $35.99
Sage green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of an American beaver sitting upright with its flat tail.
Sage green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of an American beaver sitting upright with its flat tail.
North American Beaver - Castor canadensis - Lightweight 100% Cotton Unisex Crewneck

North American Beaver

from $35.99

North American Beaver from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a giant Pacific octopus with curling tentacles.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a giant Pacific octopus with curling tentacles.
Giant Pacific Octopus - Lightweight 100% Cotton Unisex Crewneck

Giant Pacific Octopus

from $35.99

Giant Pacific Octopus from $35.99
Ocean blue lightweight cotton t-shirt laid flat, printed with a heart shape filled with small black ink butterflies and moths.
Ocean blue lightweight cotton t-shirt laid flat, printed with a heart shape filled with small black ink butterflies and moths.
Heart Full of Butterflies - Lightweight 100% Cotton Unisex Crewneck

Heart Full of Butterflies

from $35.99

Heart Full of Butterflies from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a chart of black ink illustrations of different bee species with their names.
Blue bell lightweight cotton t-shirt laid flat, printed with a chart of black ink illustrations of different bee species with their names.
Bee Chart - Bees in North America - Lightweight 100% Cotton Unisex Crewneck

Bee Chart

from $35.99

Bee Chart from $35.99
Honeycomb yellow lightweight cotton t-shirt laid flat, printed with a black ink illustration of three bumble bees flying.
Honeycomb yellow lightweight cotton t-shirt laid flat, printed with a black ink illustration of three bumble bees flying.
American Bumblebee Trio - Bombus Pensylvanicus - Lightweight 100% Cotton Unisex Crewneck

American Bumblebee Trio

from $35.99

American Bumblebee Trio from $35.99
Ocean blue lightweight cotton t-shirt laid flat, printed with a black ink line drawing of a manatee swimming, with ink splatters.
Ocean blue lightweight cotton t-shirt laid flat, printed with a black ink line drawing of a manatee swimming, with ink splatters.
Manatee - Lightweight 100% Cotton Unisex Crewneck

Manatee

from $35.99

Manatee from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a full-color chart of common butterflies of North America, each labeled with its species.
Autumn lightweight cotton t-shirt laid flat, printed with a full-color chart of common butterflies of North America, each labeled with its species.
Common Butterflies of North America - Lightweight 100% Cotton Unisex Crewneck

Common Butterflies of North America

from $35.99

Common Butterflies of North America from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and two manatees swimming in water.
Blue bell lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and two manatees swimming in water.
It's All Connected - Manatee - Lightweight 100% Cotton Unisex Crewneck

It's All Connected

from $35.99

It's All Connected from $35.99
Mauve pink lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a detailed black ink line drawing of a Cafe au Lait dahlia bloom.
Mauve pink lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a detailed black ink line drawing of a Cafe au Lait dahlia bloom.
Dahlia Cafe Au Lait - Lightweight 100% Cotton Unisex Crewneck

Dahlia Cafe Au Lait

from $35.99

Dahlia Cafe Au Lait from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of tall pine trees growing from a rocky cliff.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of tall pine trees growing from a rocky cliff.
Cliffside Pines - Lightweight 100% Cotton Unisex Crewneck

Cliffside Pines

from $35.99

Cliffside Pines from $35.99
Military green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a sea otter sitting upright.
Military green lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a sea otter sitting upright.
Enhydra lutris - California Sea Otter - Lightweight 100% Cotton Unisex Crewneck

Enhydra lutris

from $35.99

Enhydra lutris from $35.99
Ocean blue lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and a Kemp's ridley sea turtle swimming.
Ocean blue lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and a Kemp's ridley sea turtle swimming.
It's All Connected - Kemps Ridley Turtle - Lightweight 100% Cotton Unisex Crewneck

It's All Connected

from $35.99

It's All Connected from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a chart of black ink illustrations of North American frog species.
Blue bell lightweight cotton t-shirt laid flat, printed with a chart of black ink illustrations of North American frog species.
An Illustrated Guide to Native Frogs of North America - Lightweight 100% Cotton Unisex Crewneck

An Illustrated Guide to Native Frogs of North America

from $35.99

An Illustrated Guide to Native Frogs of North America from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink sketch of a hen hurrying along.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink sketch of a hen hurrying along.
Hurried Hen - Orpington Chicken - Lightweight 100% Cotton Unisex Crewneck

Hurried Hen

from $35.99

Hurried Hen from $35.99
Sage green lightweight cotton t-shirt laid flat, printed with a black ink illustration of a stand of tall coastal redwood trees with slender trunks and layered branches.
Sage green lightweight cotton t-shirt laid flat, printed with a black ink illustration of a stand of tall coastal redwood trees with slender trunks and layered branches.
Coastal Redwoods - Lightweight 100% Cotton Unisex Crewneck

Coastal Redwoods

from $35.99

Coastal Redwoods from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a bumble bee visiting a sprig of lavender.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a bumble bee visiting a sprig of lavender.
Bumblebee on English Lavender - Bombus Pensylvanicus - Lightweight 100% Cotton Unisex Crewneck

Bumblebee on English Lavender

from $35.99

Bumblebee on English Lavender from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and an orca leaping from ocean waves.
Blue bell lightweight cotton t-shirt laid flat, printed with a black line art circle connecting pine trees, mountains, a bee and an orca leaping from ocean waves.
It's All Connected - Orca - Lightweight 100% Cotton Unisex Crewneck

It's All Connected

from $35.99

It's All Connected from $35.99
Blue t-shirt with an owl design on a white background
Blue t-shirt with an owl design on a white background
Barred Owl - Strix varia - Lightweight 100% Cotton Unisex Crewneck

Barred Owl

from $35.99

Barred Owl from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a full-color illustration of an American kestrel perched among pale branches.
Autumn lightweight cotton t-shirt laid flat, printed with a full-color illustration of an American kestrel perched among pale branches.
Vibrant American Kestrel - Falco sparverius - Lightweight 100% Cotton Unisex Crewneck

Vibrant American Kestrel

from $35.99

Vibrant American Kestrel from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink whale in an ocean wave framed by the words Save Our Sealife, Keep the Sea Trash-Free.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink whale in an ocean wave framed by the words Save Our Sealife, Keep the Sea Trash-Free.
Save our Sealife - Keep the Sea Trash-Free - Lightweight 100% Cotton Unisex Crewneck

Save our Sealife

from $35.99

Save our Sealife from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a coconut palm leaning over a sandy beach.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a coconut palm leaning over a sandy beach.
Coconut Palm - Cocos nucifera - Lightweight 100% Cotton Unisex Crewneck

Coconut Palm

from $35.99

Coconut Palm from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a full-color bouquet of sunflowers, red flowers and wildflowers with butterflies and a small bird.
Autumn lightweight cotton t-shirt laid flat, printed with a full-color bouquet of sunflowers, red flowers and wildflowers with butterflies and a small bird.
Fall Bouquet - Lightweight 100% Cotton Unisex Crewneck

Fall Bouquet

from $35.99

Fall Bouquet from $35.99
Dusty blue lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a detailed black ink illustration of two Atlantic puffins standing side by side.
Dusty blue lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a detailed black ink illustration of two Atlantic puffins standing side by side.
Atlantic Puffins Pair - Fratercula arctica - Lightweight 100% Cotton Unisex Crewneck

Atlantic Puffins Pair

from $35.99

Atlantic Puffins Pair from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink sketch of a black bear walking across rocky ground.
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink sketch of a black bear walking across rocky ground.
Black Bear - Lightweight 100% Cotton Unisex Crewneck

Black Bear

from $35.99

Black Bear from $35.99
Steel blue lightweight cotton t-shirt laid flat, printed with a full-color illustration of three pink roseate spoonbills wading, one with its wings spread.
Steel blue lightweight cotton t-shirt laid flat, printed with a full-color illustration of three pink roseate spoonbills wading, one with its wings spread.
Roseate Spoonbill Trio - Platalea ajaja - Lightweight 100% Cotton Unisex Crewneck

Roseate Spoonbill Trio

from $35.99

Roseate Spoonbill Trio from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a full-color chart of North American moths, each labeled with its species.
Autumn lightweight cotton t-shirt laid flat, printed with a full-color chart of North American moths, each labeled with its species.
Moths of North America - Lightweight 100% Cotton Unisex Crewneck

Moths of North America

from $35.99

Moths of North America from $35.99
Vintage denim lightweight cotton t-shirt laid flat, printed with a black ink illustration of four dog faces carved into a mountain, with the words Mount Barkmore.
Vintage denim lightweight cotton t-shirt laid flat, printed with a black ink illustration of four dog faces carved into a mountain, with the words Mount Barkmore.
Mount Barkmore - Dog Tribute - Lightweight 100% Cotton Unisex Crewneck

Mount Barkmore

from $35.99

Mount Barkmore from $35.99
Storm grey lightweight cotton t-shirt laid flat, printed with a detailed black ink portrait of a crow's head in profile.
Storm grey lightweight cotton t-shirt laid flat, printed with a detailed black ink portrait of a crow's head in profile.
American Crow Bust - Corvus brachyrhynchos - Lightweight 100% Cotton Unisex Crewneck

American Crow Bust

from $35.99

American Crow Bust from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black geometric line art hummingbird in flight.
Blue bell lightweight cotton t-shirt laid flat, printed with a black geometric line art hummingbird in flight.
Geometric Hummingbird - Lightweight 100% Cotton Unisex Crewneck

Geometric Hummingbird

from $35.99

Geometric Hummingbird from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a black ink honey bee beneath the word Queen.
Autumn lightweight cotton t-shirt laid flat, printed with a black ink honey bee beneath the word Queen.
Queen Bee - Lightweight 100% Cotton Unisex Crewneck

Queen Bee

from $35.99

Queen Bee from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink sketch of a red fox's face looking straight ahead, its fur drawn in fine pencil-like strokes.
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink sketch of a red fox's face looking straight ahead, its fur drawn in fine pencil-like strokes.
Red Fox - Vulpes vulpes - Lightweight 100% Cotton Unisex Crewneck

Red Fox

from $35.99

Red Fox from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a hawksbill sea turtle swimming, with a patterned shell.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of a hawksbill sea turtle swimming, with a patterned shell.
Hawksbill Sea Turtle - Eretmochelys imbricata - Lightweight 100% Cotton Unisex Crewneck

Hawksbill Sea Turtle

from $35.99

Hawksbill Sea Turtle from $35.99
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black ink illustration of a black sea nettle jellyfish with long trailing tentacles.
Spring green lightweight cotton t-shirt laid flat with the sleeves rolled, printed with a black ink illustration of a black sea nettle jellyfish with long trailing tentacles.
Black Sea Nettle Jellyfish - Chrysaora achlyos - Lightweight 100% Cotton Unisex Crewneck

Black Sea Nettle Jellyfish

from $35.99

Black Sea Nettle Jellyfish from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a black ink bee with the word thankful written in script across it.
Autumn lightweight cotton t-shirt laid flat, printed with a black ink bee with the word thankful written in script across it.
Bee Thankful - Lightweight 100% Cotton Unisex Crewneck

Bee Thankful

from $35.99

Bee Thankful from $35.99
Storm grey lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a California leaf-nosed bat in flight.
Storm grey lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of a California leaf-nosed bat in flight.
Macrotus californicus - California Leaf-nosed Bat - Lightweight 100% Cotton Unisex Crewneck

Macrotus californicus

from $35.99

Macrotus californicus from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of two horseshoe crabs.
Blue bell lightweight cotton t-shirt laid flat, printed with a detailed black ink illustration of two horseshoe crabs.
Atlantic Horseshoe Crab - Limulidae polyphemus - Lightweight 100% Cotton Unisex Crewneck

Atlantic Horseshoe Crab

from $35.99

Atlantic Horseshoe Crab from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink line drawing of lilies and a hummingbird arranged in a heart shape.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink line drawing of lilies and a hummingbird arranged in a heart shape.
Hummingbird with Lillies Heart - Lightweight 100% Cotton Unisex Crewneck

Hummingbird with Lillies Heart

from $35.99

Hummingbird with Lillies Heart from $35.99
Vintage denim lightweight cotton t-shirt laid flat, printed with a chart of black ink shark illustrations, including a whale shark, hammerhead and great white.
Vintage denim lightweight cotton t-shirt laid flat, printed with a chart of black ink shark illustrations, including a whale shark, hammerhead and great white.
Shark Chart - Lightweight 100% Cotton Unisex Crewneck

Shark Chart

from $35.99

Shark Chart from $35.99
Autumn lightweight cotton t-shirt laid flat, printed with a detailed black ink portrait of a grey wolf facing forward.
Autumn lightweight cotton t-shirt laid flat, printed with a detailed black ink portrait of a grey wolf facing forward.
Grey Wolf - Canis lupus - Lightweight 100% Cotton Unisex Crewneck

Grey Wolf

from $35.99

Grey Wolf from $35.99
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of two bees facing each other with a red heart between them.
Blue bell lightweight cotton t-shirt laid flat, printed with a black ink illustration of two bees facing each other with a red heart between them.
Love Bees - Lightweight 100% Cotton Unisex Crewneck

Love Bees

from $35.99

Love Bees from $35.99

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