Size & Fit: For shoe sizes 6-9, we recommend ordering size S-M. For shoe sizes 9.5-13, we recommend ordering size M-L. Details: Lightweight jersey | Cushioned footbed | Mesh ventilation | Arch support with BONOBOS logo integral stitch | 1x1 rib cuff Fabric & Care: 53% Cotton | 26% Polyester | 17% Nylon | 4% Elastane Machine wash cold with like colors | Use only non-chlorine bleach when needed | Tumble dry low Imported