Advanced insulating yarn Super soft HeatWeaver® plush lining Flat-knit construction, with ribbed cuff Heat Holders® Women's Sloane Feather Knit Mittens are created with our high performance thermal yarn, and luxuriously soft HeatWeaver® insulation lining to maximize the amount of warm air held close to your body. This striking new design features flat-knit construction, and a ribbed cuff, to help seal in the warmth at your wrists. Matching hats are also available.