The First Lite Men's Wick Long Sleeve Base Layer Shirt's airy 150 gram Aerowool construction features 37.5 active particle technology and will dry rapidly without compromising durability or odor resistance. This layer also features 125 gram Aerowool mesh panels to maximize ventilation during active hunts. The Men's Wick Crew is the new standard for quick drying, odor-resistant, ultralight baselayers and is always worn as your first, next-to-skin layer. Ultralight 150 Aerowool construction combines the finest, 17.5 micron merino wool available with 37.5-activated nylon fibers to create a super-charged fabric with incredible performance benefits. First Lite's Wick styles also integrate 125 gram Aerowool mesh to targeted hot-zones. that also utilizes 17.5 micron merino and 37.5-activated nylon fibers. What you get is enhanced odor resistance, exponentially improved dry times, increased durability and moisture wicking, and a fabric that can cool you down when you're heating up and warm ...