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Always free shipping and returns in the U.S.

Plant a tree with every tee.

New year. New sweats.

Stay warm and cozy in sweats that are soft on you, and the planet. Our new essentials are made with high-quality, sustainable French Terry fabric so you look, feel, and do good.

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Climate Neutral Staples

Ultra-soft, sustainable wardrobe essentials engineered with performance. Designed in the perfect neutral colors to match your carbon footprint.

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Proto101 Impact

The best basics designed for a better planet.

Elevate your basics and help build a better world with us. That's why we use sustainable materials to do the least harm to the environment, and support an ethical supply chain. Our French Terry sweats are high quality and durable so your favorite basics last a lifetime and stay out of the landfills.

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Plant trees.

Trees help us fight climate change by absorbing carbon dioxide from the atmosphere that causes global warming. That's why we plant one tree for every garment to neutralize our carbon footprint.

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WOW just WOW! Best t-shirt ever and for many reasons. It fits perfectly, super stretchy, buttery soft and breathable material too. Thank you, you've got a lifelong customer!

Greg A.

Softest Fabric! Loving my new shirt! Went away this weekend and it proved to be the perfect travel companion. Lightweight yet warm enough for the airport, super soft fabric, packable…all the things. Five stars.

Christine B.

Five stars. Well done. I like my clothes a little distinctive, and I don't like cheap throw-away shirts. These things are perfect.


The solution to fast fashion.

Proto101 was conceived by fashion industry specialists as a solution to the environmental harm caused by fast fashion. We believe in responsible practices that create sustainable clothing honoring the earth, the people that make it, and the consumers who wear it. Through years of collective research and experience, we have ethically sourced materials and manufacturers that align with our mission to make high quality clothing that looks and feels great. Our approach to long-lasting, sustainable change is to create the best basics that leave the smallest footprint.

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"Game changing fashion"

"Great product and innovative"

"High quality and comfortable"

"Staples that last longer and are ultra-comfortable"

"Essentials you want to wear all year"


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