For unbeatable performance and versatility, our Aenergy Light styles solve for a full range of seasons and pursuits. Combining the right touch of warmth with exceptional wicking and breathability, this ultra-light midlayer doubles as a warm base layer to see you through winter ski tours and summer hikes alike. With a deep half zip for optimal ventilation and a laminated pocket to stash essentials, it&&';;s the perfect choice for all who seek maximum performance at minimal weight. Features Polyester content made from recycled polyester Long half-length zipper makes it easier to put on and allows rapid ventilation in warm temperatures Bonded chest pocket with zipper Flatlock seams