best socks EVER
"Perfect thickness for workout shoes, boots, they fit snug and do not move!!"
Free 2-Day
Shipping $75+
Lab-Tested
BPA & PFAS Free
Free Returns
Within 30 Days
Why We Love It:
51% Sustainable Nylon, 23% BCI Cotton, 23% Sustainable Recycled Polyester, 3% Spandex
Care
Machine wash cold on normal cycle. Tumble dry low.
Tested, Tried & True: Independently lab-tested free from BPA and PFAS. Most brands won’t claim this — because they can’t.
Premium Performance Yarns: Our high-quality, fully traceable yarns are sourced through sustainable partners, including a family-owned mill in the U.S. These materials meet rigorous chemical safety standards and are independently verified for harmful substances through certifications such as STANDARD 100 and ECO PASSPORT by OEKO-TEX®.
Biodegradable Innovation: We use CiCLO®-enabled yarns—certified by ECO PASSPORT by OEKO-TEX®—that allow yarns like nylon and polyester to biodegrade in the environment more like natural fibers. Instead of persisting for centuries, these yarns break down in a matter of years when exposed to landfill or ocean conditions.
Recycled materials, minimal waste: Our commitment to protecting the planet starts with sustainable fibers and yarns. We use synthetic yarns made from recycled plastic bottles which helps remove ocean plastic and repurpose unused short fiber from the yarn spinning process. Our sports bras are designed to minimize waste and environmental impact—without compromising on performance or comfort.
| Sizing | Men | Women |
|---|---|---|
| Small | US 5 – 7 | US 5 – 7.5 |
| Medium | US 7 – 9 | US 7.5 – 10 |
| Large | US 9 – 11 | US 10 – 12 |
| X-Large | US 11.5 – 14 | US 12.5+ |
Get To Know Our Yarn
Feel
Cushioned sole, mid compression, comfort +
Best For
Gym, running, tennis, all-day wear
Fabric
BCI Cotton, CiCLO Nylon, CiCLO Poly
Technology
CiCLO® biodegradable yarn
Premium performance yarns sourced from a family-owned mill in the U.S. — independently tested free from BPA, PFAS, and 50+ harmful substances. Engineered to last over 10,000 miles. Our standard is non-detect: if the lab's instruments can find it, we don't use it.
Independently tested to non-detect. Every result available to you. See our standards →
Overall rating: 5.0 / 5 from 4 reviews.
Review topics: ["fit","quality","comfort","socks"].
"Perfect thickness for workout shoes, boots, they fit snug and do not move!!"
"These are my go to socks for running. They are thin, but not too thin and so far I haven't torn any of them. The wear of the socks is really good. I highly recommend them as a person who reviews fitness products and loves to run and bike. In fact they are thin enough to also work as very good cycling socks."
"It’s hard to find Sox that are BPA-free and perform well for exercise. These fit the bill."
"Very impressed with quality and fit of my socks. They are definitely different than other sox"