The Buff Merino Lightweight Multifunction Neck Warmer is a versatile, extra-length tube made from 100% Australian Merino wool that provides breathable temperature regulation and natural moisture management for medium-intensity activity in cool to cold weather. Lightweight and ultra-thin at 125 g/m2, it fits adults 53-62 cm, weighs 48 g, and can be worn many ways including scarf, balaclava, helmet liner, and beanie for reliable warmth without bulk.