The North Face Women's Summit High Trail Short Sleeve was engineered with moisture-wicking FlashDry-Pro technology, the technical Summit High Trail T-Shirt is engineered for long days on the trail. Underarm gussets provide arms-up mobility, while the lightweight body-mapped fabric reduces weight and increases comfort with a backpack. FlashDry-Pro fabrics are engineered to pull moisture from the skin, push it to the surface and disperse it over a large area so it can dry as quickly as possible.