Strafe Apparel Size Chart The women's Alpha Mid Jacket is an active midlayer made with Polartec(R) Alpha(R), the first ever breathable puffy insulation. Designed to provide the warmth-without-weight and weather resistance of a light puffy, with the breathability of a midlayer for comfort throughout a wide range of conditions. Polartec(R) Alpha(R) was developed for U.S. Special Operations Forces and is now available through Strafe. Unlike down or classic synthetic fill, which require the use of "closed" fabrics, Polartec(R) Alpha(R) is a highly stable insulation that won't poke through or migrate. This allows us to create an air permeable puffy insulation package for the Women's AP Mid Jacket that's not a vapor barrier, rather one that breathes with you for active warmth. It also dries dramatically faster than other puffy insulations and is remarkably lightweight and compressible. Features: - 270 grams (size small) - Diamond quilt exterior with hanging liner - Polartec Alpha - Full length interior CF placket - Chamois fleece lined chin guard - Hem drawcord adjustment - Hand pockets - Double layer lycra cuffs with stretch panel - YKK Aquagurd Vislon & Coil zips