97 Cotton 3 Spandex, Structured, Firm Front Panel, Flexible Fit, Low-Fitting. 6 Panel Flexible Fitted Cap Seamed Front Panel with Full Buckram 6 Sewn Eyelets Pro Stitch on Crown Matching Color Undervisor Matching Color Sweatband Enclosed back for a clean, sleek appearance OTTO FLEX Stretchable Sweatband - A snug, flexible fit with antibacterial, anti-odor and moisture wicking properties U.S. Patent 6,347,410 This Style Replaces 11-423