Light as air and surprisingly warm, we designed this ultralight layer with a thin, low-profile baffle construction that actively increases thermal efficiency. That means you stay warm when the temperatures drop, but dry and comfortable during high-intensity activities. Slightly Fitted: Relaxed through the chest and sleeve, with a slightly slimmer waist. Falls at hip. Bluesign®-approved fabric helps offset impact on the environment. Wicks away moisture and dries quickly. Abrasion-resistant fabric stands up to daily wear and tear. 100% polyester is ideal for weightless comfort. UPF 50+ rated fabric blocks at least 97.5% of the sun's UV rays. Machine wash and dry. Snap-front pullover style allows for easy on/off. Reinforced bindings on collar, sleeves, and hem. Kangaroo pocket. Features our classic Mount Katahdin logo. Imported. Let me know if you have any questions.