100% Cotton Twill. 5 Panel Design, Button at Top, Contrast Sandwich Peak, Pre-Curved Peak, Stitched Ventilation Eyelets, Tearaway Label. Fastening: Self Fabric Strap, Tri-Glide Buckle. Sustainability: Control Union CU811033, EarthAware, Cotton Standard 100. Beechfield Men's Classic Cotton Sandwich Peak Cap in Bottle Green