Features Contoured Fit follows the contours of your foot for a comfortably snug fit Heat Trapolator technology: Three layers of heat-trapping materials underfoot 200g of KEEN.WARM Recycled P.E.T. insulation rated to -25°F/-32°C Speed hooks for easy lace adjustment High-rebound foam cushioning enhances comfort and movement Thermal Heat Shield insole captures warmth KEEN.FREEZE rubber outsole for traction in cold conditions Multi-directional lug pattern provides superior traction KEEN.DRY waterproof, breathable membrane seals out moisture from the inside D-ring makes it easy to attach a gaiter Materials Waterproof leather and performance mesh upper Fleece lining for warmth Non-marking multi-directional lugs for increased traction