The Mesh Hat from Columbia is constructed with Flexfit's iconic fit combined with a ventilated back crafted from quality stretch mesh for unsurpassed comfort over the long haul. Flexfit fitted cap, 55% polyester/43% cotton/2% spandex, Vented back, Warranty: Other, Battery Heated: No, Material: Cotton/Synthetic Blend, Lined: No, Type: Baseball Cap, Model Year: 2018, Product ID: 462240, Model Number: 1495921013 S/M, GTIN: 0190178682334