Youre more than a weekend warrior, so you demand high performance from your clothing. Thats why youll love our Mens Insulated Base-Layer Top. With PrimaLoft Silver insulation only where its needed and integrated stretch along with articulated elbows, you stay warm, mobile and ready for anything. 4MOST INHIBIT construction fights odors because when youre working hard to outwit ungulates on their home turf, you need every advantage possible. Merino wool naturally fights odors and regulates your body temperature, keeping you from overheating when you need to cut off a fast-moving bull. Thumbholes keep the sleeves from creeping up your arm, while a drop-tail hem keeps cold drafts off your back. Reliable YKK zippers. Offset front zipper wont chafe. Exterior is 89/11 polyester/spandex, while the interior is 79% polyester, 15% merino wool and 6% spandex. Imported. Sizes: M-2XL. Color: Black. Type: Base Layer Tops.