Here's what other sites are saying:
A crucial component to any day out on the trail, the lightweight Mammut Cabal Cap offers sun-protection of UPF40+ and dries insanely quickly. When you take a break in the shade, just pull the soft, neoprene brim over your eyes to catch a quick nap before getting back after it.
A vital accessory under an intense sun.Mammut's Cabal cap is very light and fast-drying with soft Neoprene brim. Same model as Nubian Cap, but without neck protection.