OS1st Plantar Fasciitis Socks | No Show, 1/4 Crew, Crew & Merino Wool

Heel discomfort can make even simple movement feel harder than it should. The Plantar Fasciitis Socks are engineered with intentional compression zones mapped to support the arch and help reduce the sensations commonly associated with plantar fasciitis—especially during the first few steps of the day or long periods of standing.

This design is personal to us. OS1st began when our founder searched for a way to help his wife move with more comfort as she navigated plantar fasciitis. That pursuit led to the FS6® Foot Sleeve and eventually to the first-ever plantar fasciitis sock—support built into something you can wear every day.

FS4 Merino Wool: Cold mornings, long hikes, and everyday life feel different when heel pain is part of your routine. This Merino Wool version of our Plantar Fasciitis Sock takes the same plantar fascia–focused support and pairs it with temperature-regulating fibers that stay warm in cooler weather and breathable in heat. The result is comfort engineered for movement, season after season.

Just like the original, this sock traces back to a personal need. When plantar fasciitis affected someone close to our founder, the solution became our first product and reshaped how compression could support everyday life. This Merino edition continues that purpose—support that feels natural and wearable.

• Targeted zones designed to support the arch and plantar fascia
• Merino wool blend naturally regulates temperature and manages moisture
• Cushioned heel design created for comfort during extended walking or activity
• Secure compression intended to reduce unwanted movement and slipping
• Breathable, soft interior suitable for long wear, hiking, training, or recovery