This shoe combines ThermoBall Eco insulation with a high-traction rubber outsole to make a slip-on. Features a Lightweight ThermoBall Eco insulation retains warmth. Oso fleece collar lining for comfort. Up to 20% recycled rubber outsole. Upper - 100% recycled P.E.T. ripstop upper with non-PFC durable water-repellent (non-PFC DWR) finish to help keep feet dry. Collapsible heel with elastic side panels for easy on/off.