Lightweight, breathable, UV protection, and sweat-wicking, the Trek CAP by Buff is perfect for all hikers looking for a high-performance cap for their long outings. Its UPF50 UV protection will keep you well-protected for miles, its material will help wick away your sweat, and the inner band will prevent it from dripping into your eyes. Very flexible, it easily fits into your hiking backpack. How wonderful it is to be under the sun!