Outdoor Designs PowerOn gloves are a close fitting warm, fast drying stretch glove. The mid-weight Polartec Power Stretch fabric has a smooth outer face to reduce friction between layers and has soft fleece against the skin. A fast wicking and quick drying fabric with just the right amount of stretch to conform to your hands. Box finger construction for improved fit. Power Stretch fabric cuffs. Sizing (Circumference around the knuckles): Small-7 1/2", Medium- 8", Large- 8 1/2", X-Large-9".