Thinsulate® is a type of synthetic insulation material developed by 3M, a multinational conglomerate corporation. It is widely used in various cold-weather apparel and accessories, such as jackets, gloves, boots, and hats, to provide effective warmth and comfort without adding bulk or weight. No holes,rips, smells, foul substances. ❄️ Sign of aging and prior use but not in a way that affects its usability. It will perform as intended. Warm! Washed using cold water and no detergent ( to avoid fragrances) for an initial rinsing off. Closes with zipper and snaps. Zippers at bottom of legs along with rubber grips.. Ships from a clean, smoke free home. Thank you for looking. ☃️