Waterproof / Windproof Insert DuPont Sorona Insulation (Renewably Sourced Fiber) Super Soft ThermalFUR Lining Easily accessible YKK Zipper allows for easy on and off Elasticized Wrist Soft fleece nose wipe on thumb Whether they’re heading down the bunny slope or building snow forts, little hands require maximum warmth. Thanks to a super soft ThermalFUR lining and DuPont Sorona insulation, these mittens lock in heat and provide superior comfort all season long. And the Waterproof / Windproof Insert keeps hands dry and warm. The easily accessible YKK Zipper allows for easy on and off while the 100% digital PU palm enhances grip and durability.