Brands   / 


Date Established 08/2020
Founder Liyin Kok, Rafael Soto
Headquarters Seattle, WA
Press Contact Liyin Kok


Men's Long Sleeve T-Shirt
Men's Long Sleeve T-Shirt $29.00
Women's Classic Long Sleeve T-Shirt
Women's Classic Long Sleeve T-Shirt $29.00
Men's French Terry Classic Hoodie
Men's French Terry Classic Hoodie $79.00
Men's French Terry Jogger
Men's French Terry Jogger $69.00
Women's French Terry Jogger
Women's French Terry Jogger $69.00
Women's French Terry Zip Hoodie
Women's French Terry Zip Hoodie $79.00
Men's Classic Tank
Men's Classic Tank $26.00
Women's Classic Tank
Women's Classic Tank $26.00
Women's Relaxed T-Shirt Dress
Women's Relaxed T-Shirt Dress $39.00
Women's Classic V-Neck T-shirt
Women's Classic V-Neck T-shirt $29.00
Women's Maxi Dress
Women's Maxi Dress $49.00
Men's Relaxed Crew T-shirt
Men's Relaxed Crew T-shirt $29.00


Proto101 strives to provide better alternatives to disposable, "fast" fashion by sourcing sustainable fabrics, making durable garments in timeless silhouettes, supporting an ethical supply chain, and amplifying minority voices. With five decades of industry experience, Proto101 has made it simple for people to look good, feel good, and do good.

Using American-grown Supima cotton and TENCEL™ lyocell, a highly sustainable fiber, Proto101 ensures comfort with durability. TENCEL lyocell is sustainably produced from renewable wood materials without use of pesticides or insecticide meaning you can go back-to-basics without sacrificing quality.

Proto101 also makes it easy for everyone to protect their environment directly by planting a tree with each garment purchased. By planting one tree, Proto101 is able to sequester up to 48lbs of carbon dioxide greenhouse gasses per year which directly impacts climate change and benefits the environment.

Founding Story

Proto101 creates sustainable basics designed to last using eco-friendly materials and ethical manufacturing practices. Like all good stories, the idea for Proto101 started over dinner conversation about work, fashion, and friends. Rafael Soto and Liyin Kok were discussing the various t-shirts they had in their closet, but not the perfect one. The perfect tee that felt like luxe cotton, had key performance features, and made sustainably and ethically.

With decades of experience launching brands for e-commerce retailers for two decades, Kok and Soto believed in a better way to make fashion for the planet and people. The fashion industry is responsible for 85% of greenhouse gas emissions which cause global warming (wildfires, rising sea levels, melting ice caps). With their expertise and passion, they launched Proto101.

Proto101 is a better basic, made to be soft on you and the planet. The clothing is timeless, made with high-quality materials that will last, so you buy less over time. To reduce the environmental impact from yarn to you, the company sources sustainable materials that are environmentally friendly and socially benefit the local communities.

Team Bios

Liyin Kok is the Co-Founder of Proto101 and leader in retail business strategy and product development. Proto101 is a sustainable clothing brand known for high-quality wardrobe essentials and sustainable fabrics that are soft, stylish, and comfortable. After spending almost two decades launching and growing successful businesses and products for multibillion dollar e-commerce brands, Liyin knows what it takes to launch a start-up from the ground-up, develop and source high-quality products with an ethical supply-chain, and fuel long-term growth.

Liyin previously led Brand and Product Development for Amazon Private Brands Fashion where she had organizational responsibility for Product Strategy, Global Supply-Chain, and Brand Management in a rapid growth, new start-up business. She developed the Brand and Product Strategy that launched multimillion dollar brands and products, drove strategic growth through product expansion and extended sizing, built a global supply-chain, and successfully launched apparel and accessories.

Before joining Amazon, she served as Vice President of Product and Brand management for Fashion Private Brands at Macy’s where she owned end-to-end product strategy and global sourcing, and delivered sales and margin growth.

Liyin holds a BA in Economics from Cornell University.

Rafael has 25 years experience in the apparel retail industry as a design and creative leader who has successfully launched and over-hauled numerous brands spanning high-end suiting to casualwear. He has designed for iconic brands like Ralph Lauren, Brooks Brothers, and John Varvatos. Most recently, he launched and designed Amazon’s top performing, customer-loved brands Amazon Essentials and Goodthreads. Rafael grew up in Wisconsin to Puerto Rican parents. After the suicide of his nephew 2 years ago, Rafael saw this as a catalyst in his life to seize the day, choose his own path and to start his own company with Liyin and Ashleigh. He is married to his partner Mark.


Artful Living - Sep 27, 2022 The Top Comfort Clothing Brands of 2022
Beauty News NYC - Sep 08, 2022 Metro Man: The Proto101 Jogger Duo Ensemble ""Fall ushers in the need for new workout clothes, and we recommend Proto101‘s Classic Full Zip Hoodie and the matching Jogger Sweatpants.""
Daily Mom - Jul 19, 2022 C18 Of The Best Stylish & Trendy Summer Outfits For The Whole Family ""There are so many beautiful places to visit, why not update your entire family’s summer outfits with trendy, stylish dresses to beach cover-ups, comfy travel joggers to short sleeve button-ups.""
The Quality Edit - Jun 18, 2022 To Hellfire Club And Back: The Stranger Things Season 4 Style Guide ""Our favorite ragtag gang of mystery solvers returned this month for a captivating fourth season of cult-favorite sci-fi horror drama Stranger Things.""
LA Weekly - Jun 13, 2022 2022 FATHER’S DAY GIFT GUIDE ""A list that will make your father so happy that he doesn’t need to hide what you got him in the garage next to last year’s gift.""
Sweety High - May 04, 2022 16 Gorgeous Fashion Brands to Gift Mom This Mother's Day ""Don't panic, but Mother's Day is this weekend, so if you're still doing your shopping, you may want to hurry things up.""
Patch - Feb 01, 2022 Valentine's Day Gift Guide 2022
Thrive Global - Sep 15, 2021 "Focus on having a great product and being innovative."
The Pride LA - Sep 01, 2021 Meet Rafael Soto: The designer and founder of Proto101 – the all-inclusive sustainable fashion brand that you NEED in your wardrobe.
BuzzFeed - Sep 01, 2021 3 Ways We Can Stop Fast Fashion From Destroying the Environment
Business Insider - Apr 12, 2021 Game Changing Fashion Brand Proto101 Pledges to Plant 50,000 Trees


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