The Women\'s Allegiance II Midlayer can be worn alone or layered up with t-shirts and shell jackets on hikes.Made with an Ilus Core Stretch fabric, the midlayer offers a 4-way stretch allowing freedom of movement. This also has a brushed back finish for a warm and comfortable feel.Lightweight Ilus Core warm waffle grid backed stretch fabricQuick dryingFull length zipInner zip & chin guard2 x lower zip pocketsStretch binding to cuffs and hemFabric: 100% Polyester