This is the Women's Thermal Speedwork Zip-Neck. It's great for cold weather trail running or layering for Nordic sports. The design and lightweight knit of this piece is super versatile. It can accommodate a wide range of temperatures whether you wear it next to skin or with a base layer underneath. Our soft and stretchy speedwork fabric has a smooth and durable face. And it has a brushed interior for great warmth and superior wicking. It's a performance blend of 85% polyester and 15% spandex. And it's greeted with Polygiene Permanent Odor Control keeping things fresh for the life of the garment. We designed it with a lined collar for extra warmth when you need it. And it has a deep zipper for on-the-fly temperature regulation. The zippered chest pocket is great for stashing light essentials like a snack for the trail or your house key. The overlapping thumb holes are cut wide for comfort and provide extra coverage for those particularly cold days. If you're skiing or skate-skiing up a steep snowy hill, the Women's Thermal Speedwork Zip-Neck will keep you comfortable when you're covering ground in the cold.