Mountain Hardwear Canyon Sun Hiker 100% Nylon The breathability of the Mountain Hardwear Canyon Sun Hiker is further enhanced by the inclusion of mesh sides and a Coolmax sweatband. For windy days out on the water, the Canyon Sun Hiker is nearly impossible to lose as a closed cell brim causes the hat to float to allow for easy retrieval from the water. The Canyon Sun Hiker has UPF 50 sun block properties and features a darker color under the brim to reduce glare, for full facial shading and to allow for better vision on bright days. The Canyon Sun Hiker is constructed of a lightweight and durable 70% nylon and 30% polyester fabric that is wrinkle resistant, breathable and durable to provide you with years of continued use with outdoor adventures.