Featuring 17.5-micron merino wool spun around nylon, Sitkas Mens Merino Core Lightweight Bottoms deliver all the performance benefits of merino wool along with backcountry-ready durability. Merino wool provides a chafe-free next-to-skin feel along with moisture-wicking performance and odor management so you can hunt harder and smarter. Merino wool also packs a load of warmth for its weight, while maintaining exceptional breathability. 85/15 merino wool/nylon. Imported. Sizes: M-2XL. Camo pattern: GORE OPTIFADEConcealment Subalpine. Type: Base Layer Bottoms.