This Riverside 6-Panel Reflective American Flag Cap features our performance 85% Acrylic, 15% Wool structured front panel with 100% polyester mesh back. Coupled with our American Fit(TM) design, fitting US heads sizes MD - 2X. Traditional caps only fit sizes SM - XL. This American Flag Cap features a front reflective American Flag Patch. Lastly, the Snap Back closure offers a comfortable and adjustable fit. Patriot Series RIVERSIDE 6-PANEL STRUCTURED FRONT MESH BACK DESIGN 85% ACRYLIC, 15% WOOL PERFORMANCE FABRIC WITH 100% POLY MESH BACK AMERICAN FIT(TM) SIZING (Fits Men&';s MD - 2X) SNAP BACK CLOSURE FOR COMFORTABLE AND ADJUSTABLE FIT AVAILABLE IN COLORS: Grey/Black ONE SIZE FITS ALL