We don't need to be hiking around Crater Lake National Park to enjoy the sun protection of the Mountain Hardwear Crater Lake Long-Sleeve Crop Top. With UPF 50 protection, this lightweight sun shirt screens out harmful UV rays while wicking moisture off our skin and drying quickly to keep us comfortably cool, making it an awesome next-to-skin layer for hiking, backpacking, climbing, paddling, and camping in hot and sunny weather. The cropped length pairs perfectly with our high-rise bottoms, while the mock neck and low-profile thumbholes extend coverage where we need it.