I've used it a few times, but there are no noticeable stains. Color: Gray Size: Free Made with cool vital fabric. A cool hat series that can be used wet. Uses COOLVITAL fabric. *This material lowers the fabric temperature by vibrating and evaporating the absorbed water, thereby cooling it. UV cut + cool material & even cooler when wet. It's a cool and comfortable hat that can be made cool again and again by wetting it and shaking it. Features a Velcro size adjustment function. Comes with a removable chin strap for peace of mind even in the wind. [Size]: Width 30 x Height 16 x Depth 31.5cm, Head circumference 55-58cm, Brim length 9cm