The first ever Plantar Fasciitis no-show sock from OS1st featuring award winning, patented FS6® technology. Wearing the FS4 PF socks during runs or sports activity will aid in preventing PF symptom onset and act as an overall foot health and performance aid. With precise targeted compression levels, the FS4 features Compression Zone Technology® that is designed for proper foot support and injury prevention. In addition, soft moisture-wicking fabric with anti-odor treatment and padding in the right places which creates a technical performance sock that strengthens the foot structure and prevents Plantar Fasciitis, as well as overuse injuries.