The Ultra-Thin Striped Crew Sock is a lightweight crew that slides into any shoe, exceptionally comfortable with cushioned support and a playful stripe.
Why you'll love it:
51% Sustainable Nylon, 23% BCI Cotton, 23% Sustainable Recycled Polyester, 3% Spandex
Care
Machine wash cold on normal cycle. Tumble dry low.
Built on CiCLO® biodegradable fiber.
CiCLO® is built into our recycled synthetics to do two things: shed fewer microplastics in wear and wash, and biodegrade rather than linger. Independent testing shows CiCLO treated fibers biodegrade in under four years — so they don’t add to long-term microplastic pollution.
Certified by ECO PASSPORT by OEKO-TEX®.
| 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 7 reviews.
Review topics: ["fit","quality","comfort","socks"].
"These are fantastic socks. Incredibly soft but they hold their shape well. Mine have nice longevity so far with very heavy use. I much prefer the simple blue stripes to a swoosh any day. You’ll want to buy multiples."
"Fabric feels nice. Not too thick and comfortable. Perfect crew sock."
"High-quality, comfortable, I love wearing them for workouts and long runs"
"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"
