Whether you&';re on the skin track or the single track, those first rays of warming spring sunshine after a long winter are something special. While you&';re soaking up that vitamin D, the Crater Lake(TM) Long Sleeve has you protected from unwanted UV rays thanks to its UPF 50+ fabric. This lightweight and comfortable top also pulls double duty as a breathable baselayer when the clouds roll in and it&';s time to layer up. Uses: Backpacking, Rock Climbing, Hiking, Camping Broad Spectrum filters out harsh UVA and UVB rays UPF 50+ Recommended by The Skin Cancer Foundation HeiQ Mint(TM) plant based odor control technology Soft, jersey knit with moisture wicking properties Low-profile thumbholes Heat transfer MHW logo at left sleeve cuff Fabric Body: Solar Knit Jersey 88% Polyester, 12% Elastane