Women Thermal Underwear Legging Pants Merino Wool Warm Yoga Leggings - Natural Merino Wool Composition: • 75% Merino wool, 20% polyester, 4% nylon, 1% spandex. • Machine washable. Do not bleach. Tumble dry low. Warm iron. Iron with a cloth between. Dry cleanable. Ladies' classic mid-waist thermal leggings. Crafted from delightfully soft merino wool, they will keep you feeling warm and snug, yet also soft and light. Take winter in your stride.