The Patagonia 3 Midweight Zip Neck is a classic and is probably owned by a majority of outdoorsy people in the US. This is an all around piece used for both warmth and moisture management. We own bunch of them between all us in the store. About Capilene Capilene baselayers feature a moisture-wicking polyester fabric that dries quickly. Capilene polyester is also recycled, recyclable and features Gladiodor® garment odor control. Details •Capilene 3 Midweight fabric has a durable, stretchy, double-weave construction, and the smooth jersey face slides easily beneath layers •Brushed for warmth, softness and compressibility •Zip-neck for easy climate control is backed by kissing welts for low-bulk comfort next to skin •Raglan sleeves and underarm panels placed strategically to provide full range of motion and comfort under layers •Straight hem •Cut long enough to tuck in •Solids: 5.4-oz Polartec® Power Dry® 100% polyester (65% recycled) double knit. Heathers: 5.4-oz Polartec Power Dry 100% polyester (51% recycled) double knit. Both with Gladiodor® odor control for the garment. Recyclable through the Common Threads Recycling Program •226 g (8 oz)