This durable, comfortable hiking boot will take you anywhere, whatever the weather. Two types of insulation cut the chill, and the outsole is designed to holds its ground in icy, slick conditions. 200g KEEN.Warm insulation: Who knew charcoal bamboo could create something that keeps your feet warm? But it makes KEEN.Warm, a lightweight insulation that provides warmth where you need it most. Gaiter ring hook. Cleansport NXT(TM) for natural odor control. KEEN.Dry waterproof breathable membrane: A proprietary waterproof, breathable membrane that lets vapor out without letting water in. TRAPOLATOR underfoot insulation system. Waterproof nubuck leather upper. Dual climate non-marking rubber outsole. Heat Trapolator: Three layers of innovative heat-trapping materials get sandwiched underfoot to hold warm air in. Works a lot like the insulation in your house. Weight: 16.8 oz Imported.