Molehill Kids Shelled Cold Weather Booties (snow-mocs) are made of an exterior shell of durable Teflon-coated waterproof breathable nylon. Plush polyester fur makes these boots comfy. Thinsulate fill for better insulation and less material. The bungee (bungie) adjustable cord at the instep and the hook and loop closure at the calf keeps these booties on even the most active kicker! Rubber outsoles grip well on snow and provide great wet-surface traction. Molehill logo on Velcro hook. Coordinate with all of our shelled mitts, hats, jackets, snowsuits and summit bibs! ABOUT MOLEHILL MT. EQUIPMENT: Since 1994, Molehill Mt. Equipment, Inc. has concentrated on offering the highest quality infant, toddler, and junior apparel reminiscent of the top quality products from the adult outdoor sporting goods industry. Our apparel lines stress a layering concept and offer technical fabrics and functional features. We guarantee all Molehill mountain equipment against defects in materials or workmanship for the life of the product. Please contact our service department for any specific inquiries. SIZING: Small – 5″ sole (infant); Medium – 5 3/4″ sole (toddler); Large – 6.5″ sole (toddler+). All measurements in inches.