New Secure-fit lace-capture system Padded tongue and collar for comfort Adjustable hook-and-loop strap Removable felt liner with KEEN.WARM insulation rated to -40°F/-40°C KEEN.FREEZE winter rubber compound Material Waterproof lightweight injected EVA shell and textile upper Non-marking rubber outsole leaves no trace Technologies KEEN.Warm 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