Side view of Unisex OS1st Plantar Fasciitis crew socks in black and grey – featuring graduated compression to alleviate heel pain, reinforced arch support, cushioned footbed for comfort, and breathable merino wool blend for temperature regulation.
Side View of OS1st FS4 Plantar Fasciitis Sock – featuring targeted compression for plantar fascia relief, cushioned heel and arch support, and moisture-wicking materials for foot health.
Side View of OS1st FS4 Plantar Fasciitis Sock – featuring targeted compression for plantar fascia relief, cushioned heel and arch support, and moisture-wicking materials for foot health.
OS1st sock brand features with icons and text on a white background
OS1st care instructions and shoe size chart on a white background

Unisex FS4 Plantar Fasciitis Merino Wool (Crew) - Black

$30.99 USD
By Os1st
Size
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Discover therapeutic comfort wrapped in premium natural fibers with the OS1st FS4 Plantar Fasciitis Merino Wool Crew Socks in Black. These socks deliver advanced pain relief, arch support, and long-lasting comfort—perfect for cooler weather, hiking, or everyday wear.

Key Features:

  • Medical-Grade Targeted Compression – Graduated compression zones support the plantar fascia and Achilles tendon, reducing strain, swelling, and discomfort.
  • Premium Merino Wool Blend – Naturally moisture-wicking, odor-resistant, and temperature regulating to keep feet warm in winter and cool in summer.
  • Crew Length Coverage – Provides full arch, heel, and calf support, ideal for outdoor adventures or long days on your feet.
  • Seamless Toe & Light Cushioning – Prevents irritation and offers extra comfort without added bulk.
  • Y-Heel & Anatomical Fit – Ensures a secure, stay-put fit that moves comfortably with your foot.
  • Breathable & Soft – Combines the natural softness of Merino wool with durable performance fibers for comfort that lasts all day.
  • Helps with foot conditions such as plantar fasciitis, heel pain, arch pain, swelling, poor circulation, blister prevention, cold feet, and general foot fatigue

Perfect For:

  • Hikers, runners, travelers, and anyone spending hours on their feet
  • Individuals managing plantar fasciitis, arch pain, or cold feet
  • Outdoor lovers wanting thermal regulation, odor resistance, and targeted support