The Active200 3/4 Thermal Pant is cut from 100% Australian Merino wool at 200g/m2 and 18.5 micron – fine enough to sit next to skin all day without the itch synthetic base layers can't avoid. Merino's natural thermoregulation keeps you warm when the chairlift stalls and breathable when you're working hard, and it's Woolmark Certified, made with Responsible Wool Standard certified wool and Oeko-Tex 100 certified. An elasticated waistband, gusset panel for movement and flatlock seams round out a 3/4 length base layer built to be worn, not just owned.