WoolX Mens Explorer 1/4 Zip - Black - MED Mid-weight 1/4 zip merino wool top - wear alone or as a base layer next to the skin. (Weight of size large 12.8 ounces - 358 grams), designed to keep you warm and comfortable when active outdoors in cold weather. Perfect for everyday wear, running, hiking,hunting, mountain biking, skiing, snowboarding, or just exploring outdoors Merino wool provides natural odor control, moisture wicking, breathability, and incredible comfort -- it will even keep you warm when wet Underarm gussets for extended range of motion and flat-lock non chafe seams provide the ultimate in comfort Machine wash and dry - no shrinkage - turn inside out - NO ITCH GUARANTEE