The Mountain Hardwear™ Crater Lake™ Long Sleeve Crew is a light, breathable, and comfortable sun shirt that doubles as a base layer. With UPF 50 construction, this tee provides excellent sun protection. The innovative HeiQ Mint plant-based odor control technology keeps you feeling and smelling fresh. Complete with a crew neckline and long sleeves with thumbholes, this tee offers both style and functionality for all your activities.