Self & Lining: 100% cottonContrast Fabric 1: 100% polyesterContrast Fabric 2: 65% polyester, 35% cotton Hand wash Adjustable back strap Front embroidered design Mesh back panel Brim measures approx 2.25" in lengthOS measures approx 23" in circumference Made in US Our Style No. RHUF-MA112 Manufacturer Style No. RHPS26HA02124