Patagonia's most versatile synthetic baselayer keeps you dry and warm. Take control of your inner thermostat with this warm, quick-wicking zip-neck. Made of our Capilene® 3 Midweight fabric for excellent insulation and next-to-skin comfort, it's our most versatile and fastest wicking performance baselayer. Capilene 3 provides stretch, durability and fast dry times. Brushed on the inside for warmth, it's soft and compressible, and the smooth jersey exterior glides smoothly under layers. The low-bulk zip-neck makes for easy venting. Details include raglan sleeves and underarm panels for unlimited mobility and offset shoulder seams to eliminate pack-strap chafe. Made of a 5.4-oz Polartec® Power Dry® polyester (65% recycled) double knit with Gladiodor® odor control for the garment. Recyclable through the Common Threads Recycling Program.