Design: Secure-fit lace-capture system Adjustable hook-and-loop strap Padded tongue and collar for comfort TPU heel-capture system for stability In-Shoe Comfort: Breathable mesh lining Removable PU insole for long-lasting comfort Durability and Traction: KEEN.DRY waterproof, breathable membrane that lets vapor out wihtout water getting in Waterproof leather and textile upper PFC-free durable water repellent Cleansport NXT(TM) for natural odor control Non-marking rubber outsole leaves no trace Additional Details: Care: Gently brush leather with a soft bristle brush or hand towel to remove loose dirt and debris; Tough stains may require a leather cleaner