Smartwool's warmest base layer, their Women's Merino 250 3/4 Bottom is perfect for the coldest ski days or for cool weather workouts. The 3/4 length eliminates bulk in ski boots, and a Merino-lined, wide elastic waistband is designed for maximum comfort. 100% Merino next to skin is designed to help keep you thermo-regulated and move moisture away from skin no matter where your day takes you.