Omni-Shadeô 100% textured nylon poplin on top, sides and brim; Omni-Wickô sweatband and mesh vents; Omni-Shadeô UPF 50 protects you from the sunís harmful rays; Omni-Wick sweatband and mesh venting actively breathe and pull moisture away from your skin to keep you cool; Adjustable drawcord and toggle at back; Fits most: 21.5″ – 24.5″; 3″ brim;