The Capilene® 3 MW Crew is Patagonia's most versatile synthetic baselayer in a crewneck top! The Crew is warm and wicks moisture extremely well. TheCapilene 3 midweight fabric has a durable, stretchy, double-weave construction and the durable smooth jersey face slides easily beneath layers. It's brushed for warmth, softness and compressibility. The rib-knit collar is soft next to skin and the raglan sleeves and underarm panels are placed strategically to provide full range of motion and comfort under layers. The shirt has a straight hem and is cut long enough to tuck in. this slim fit crew neck weighs (8.6 oz) 244 g. The solid version is 5.4-oz Polartec® Power Dry® 100% polyester double knit (65% recycled) and the heather version is 5.4-oz Polartec Power Dry 100% polyester double knit (51% recycled), both with Gladiodor® natural odor control. This shirt is even recyclable through the Common Threads Recycling Program!