MAPP Merino wool, named after New Zealand's famous specially-bred Merino sheep, is known around the world for its incredibly fine fibers used to create super-soft, itch-free products that keep you warm in the winter and cool in the summer. Each fiber contains thousands of tiny little pockets that trap air to insulate you against the elements. These naturally porous fibers also wick moisture away from the skin to help regulate temperatures more naturally. Developed with the Merino Advanced Performance Programme, the Hincapie WickWool Merino Base Layer features comfortable flat-lock, cover-stitching in an anatomical, multi-sport design that fits the body like a glove, providing exceptional freedom of movement. Sweat is wicked away from the skin to help regulate body temperature. The itch-free, antimicrobial merino wool resists odor and retains its insulating properties, even when wet, for superior comfort in a wide variety of conditions. MAPP Merino Wool is 100% natural, sustainable, and biodegradable.