ASI Advanced Sock Integration Fit Coolman Moisture Wicking Yarns With Antimicrobial Spandex Stay Up Rib Cuff Logo Embroidery On Cuff Snug Fit Heel Arch Support Rib Knit Compression Ankle Rib Band Calf And Shin Cushion Toe And Heel Cushion Reinforced Ghost Seam Toe Box Fit: ASI FIT Weight: MIDWEIGHT Fabric: SYNTHETIC SUPERIOR MOISTURE WICKING COOLMAX® BLEND: 41.5% COOLMAX / 41.5% COTTON / 15% NYLON / 2% SPANDEX S/M = US 5 - 8.5 L/XL = US 9 - 13