Pre owned great condition Merino is standard issue for next to skin insulation. It works with your body's own heating and cooling system to keep your core temperature where you want it. This heavier-weight top is a wonderful base layer in very cold weather. It works alone too in cool to cold conditions. Perfect for ski touring, mountaineering and backpacking adventures and for high output snowshoeing and nordic skiing. Made of interlock knit merino wool, a fiber that wicks fast to keep you dry, and is naturally antimicrobial Flatlock seams eliminate chafing Back body seam wraps to front for body enhancing fit Shoulder panels move top shoulder seams for comfort with a pack 20cm front zip with a semi-locking slider Tech specs Weight 230g (Medium) Ideal for Snowsports Camping and hiking Alpine climbing and mountaineering Type Base layer Fabric weight 250gsm Fabric content 100% merino wool Antimicrobial treatment No UPF rating 40-50+ (Blocks ~97.5% of UVA/UVB) Made in Viet Nam