Some layers *** up doing more than you expect. The Arcteryx Veilance Mionn insulated overshirt is one of them. Warm enough to wear on its own. Light enough to sit comfortably under a shell. Recycled Coreloft™ insulation provides dep***able warmth, while Terra Tex softshell fabric adds breathability, weather resistance and stretch. Wind-resistant, moisture-resistant and finished with UPF 50+ protection. A piece that earns its place year-round. Body: Terra Tex™ Nylon, 5% Elastane Insulation: Coreloft™ 100% Polyester Moisture-resistant Fabric Wind Resistant Insulated Convertible Collar UPF Rating: UPF 50+ 2 Zip Hand Pockets 2 Chest Pockets Internal Zip Pocket Style Code: X000009117-002291