The Mountain Hardwear Women's MicroChill Zip T is a lightweight fleece pullover that can be worn in place of a sweater or sweatshirt or worn as a mid-layer during active pursuits. With its superior warmth to weight ratio and breathability this top makes for a great cold weather training layer. Flat-lock seams make it comfortable when worn with a pack and a deep 10-inch front zip will help keep you ventilated when your core temps rise.