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Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.
Perfect performance, inspired by champions and created for your ultimate comfort.
The T-Free® Run running sock is a thin, technical sock designed with a big toe separation for added comfort and stability during your road runs.
In running, the big toe is crucial for balance, alignment and propulsion. That's why we have developed T-Free® technology in collaboration with athletes such as Jonathan Albon. This technology allows the big toe to move freely and independently, improving your comfort and stability when road running.
The socks incorporate all the innovations expected for trail running. The left foot/right foot anatomical construction, combined with In & Out technology (no cut yarns), offers a perfect fit and superior comfort. Polygiene fibres and ventilated mesh positioned under the foot keep your feet cool and dry.
The ankle support area guarantees a secure and stable run, while the wide grip band improves adherence, and the reflective band ensures optimum visibility, even at night.
We are a Seattle, WA based outdoor gear store with a mission to make climbing, backpacking, skiing & mountaineering accessible and enjoyable for everyone.
© 2026, Master Store
