Injury Prevention + Care

FS4™ Plantar Fasciitis Socks by OS1st


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The FS4™ features Compression Zone Technology with precise targeted compression levels that are designed for proper foot support and injury prevention.
  • Patent pending Compression Zone Technology®
  • Four different zones of compression
  • Medical grade support
  • Soft moisture-wicking fabric
  • Anti-odor treatment 
  • Material: 87% Nylon, 13% LYCRA® Spandex