Run on Purpose

Created, Tested, and Trusted by Runners

We listen to real runners, test every detail, and build performance-driven gear that eliminates distractions—no blisters, no slipping, just pure comfort and support.

When you Run on Purpose, every step should feel as strong as the reason you started.

Socks with Purpose®

Every OS1st sock is built from the ground up with the same core elements—moisture control, blister protection, a roomy toe box, and targeted zones of compression from light to firm.

From there, we build for purpose: performance, recovery, wellness, and pain relief.

"I’ve been struggling with Plantar Fasciitis for months now and these socks help minimize the pain while I am running! Extremely high quality and they don’t slip either, which is a huge win!"

Molly Hernandez, Ultramarathon Runner | @yourrunningbff

“I’ve been training in both the
Active Comfort and Thin Air socks for the past year, and as I am training to run my first ever marathon I can confidently say that the Active Comfort Crew
Socks will be my race day sock of choice!”

Chris Chung, Runner | @cchungy_

"I haven't gotten a single blister running in OS1st socks, not even on long runs with intervals! They feel supportive with light cushioning and I can feel a huge difference with the compression zone technology. They're perfect for marathon training."