WATERPROOF: KEEN.DRY waterproof breathable membrane keeps your feet dry and comfortable all day long by allowing vapor out without letting water in INSULATED: KEEN.WARM 200G insulation helps keep feet warm in cold temperatures but still allows feet to breathe EASY ON/OFF: Easy-slide bungee capture system provides a secure fit while offering a quick and easy way to get footwear on and off; Featuring an additional hook-and-loop strap in little kid and toddler sizes FEEL-GOOD MATERIALS: Durable premium leather and breathable performance mesh deliver a fast pace; Featuring ethically sourced leather from LWG-certified tanneries ZIPPY FEEL: The lighter, more athletic construction provides lightweight performance for active kids; Agile rubber tread keeps them on their feet and confident