The FS4 Plantar Fasciitis Crew sock featuring award winning, patented FS6® technology made for wearing during activity to prevent Plantar Fasciitis symptom onset and act as an overall foot health and performance aid. With precise targeted compression levels, the OS1st FS4 Plantar Fasciitis Crew sock features Compression Zone Technology® designed for proper foot support and injury prevention. With soft moisture-wicking fabric with anti-odor treatment and padding in the right places, the FS4 creates a technical performance sock that strengthens the foot structure. The FS4 Plantar Fasciitis Crew specifically targets Plantar Fasciitis, Foot Fatigue, and Arch/Heel Pain.

• Medical Grade Support
• Y-Gore heel for anatomical shape
• Seamless Construction
• Extra cushioning without the bulk
• Anatomical left/right design for perfect fit

Before ordering, use this size chart for an accurate fit.

• Small: Men's Shoe 3-5.5, Women's Shoe 4-6.5
• Medium: Men's Shoe 6-9.5, Women's Shoe 7-10.5
• Large: Men's Shoe 10-13, Women's Shoe 11+
• Extra Large: Men's Shoe 13.5+