The sun doesn’t take a break from the outdoors just because the temperature takes a dip, and neither should you. Harmful UV rays are amplified by rock, water, or snow on the trail, which makes covering up in cold weather just as crucial as when the sun is strongest in peak summer. The Crater Lake™ Heavyweight long sleeve half zip has you covered with UPF 50+ sun protection, HeiQ Mint™ anti-odour derived from plants, and a soft grid fleece backing for dawn patrol outings covered in cool morning dew. Wear it as a stand-alone top on shoulder season excursions or as an extra-toasty, breathable baselayer for spring skiing and sunny, high-alpine travel.