Fleece lined, brushed polyester spandex is soft and warm inside. Thermal properties trap more, warm dry air while wicking away sweat and moisture very fast. Heavy, 8-ounce fabric is warm and comfortable on the skin in cold weather while doing winter activities. These arm warmers (sleevies) are long to cover the wrist and stays tucked in to the sleeve of a jacket. The POLAR SERIES performance fabric works well because it is highly breathable and manages moisture fast while providing more thermal benefits. It features a high-quality woven logos. This clothing is made in the USA. Prevent snow and cold from sneaking into the space between your jacket and your gloves or mittens. The Sleevy snugly fits over your wrists and loops around the thumb to maintain a secure fit. Moisture wicking fabric moves moisture away from the skin while trapping, warm dry air next to your body. Comes in a pair. Soft , stretchy base layer version with thermal properties.