Loading... Please wait...These hats fly out of the store in the summer - even in Seattle! Their biggest feature is the removable, mesh-lined sun shield that hangs off the back to protect the sides and back of your neck. The material has UPF 50 sun protection and is 100% lightweight nylon with a Teflon treatment for water and stain resistance. The bill is extra long for ultimate sun blockage and is dark colored under the bill to reduce glare. There is a velcro closure on the back for one size fits all fitting.