The Broad Ribbon is 100% sun light proof and removes all UV rays that may harm your skin and eyes. The main body is made from 55% linen and 45% cotton so will keep you cool and allow your skin to breath under its shelter. There is an inner layer of polyester that gives the high level of UV protection. A removable strap is sweat absorbent and easy to clean by hand, helping to keep the rest of the hat clean. The size is adjustable using a strap inside the hat so can fit a range of sizes. Please note; that the level of sun protection offered will vary according to weather conditions.