Unable to accept returns on base layers. The perfect base layer for every adventure regardless of season, Merino Wool works to regulate your body temperature, wicks sweat away as a vapor, and cancels out odors. We use 190gsm merino wool for our lightweight base layers We also use fine fibers measuring 19.5 microns, which is the secret to making a wool garment that does NOT itch. Bottoms have a large elastic waist band and foot stirrups to prevent legs from riding up while putting on your outer layer. Materials 190gsm merino wool Features Large elastic waistband Foot stirrups