The Hot Chillys Men's Active Heat Glove Liners add extra protection from the cold! They slip easily inside your outer gloves, and up the level of warmth while keeping skin extra dry and comfortable. They're made with innovative yarns that wick sweat and provide thermal regulation. For extra warmth, they're equipped with a heat-pack pocket, and the ribbed-knit cuff clamps comfortably around your wrists. Sensor tips in on the thumb and index finger let you navigate your smartphone without exposing your skin to the cold.