Molehill Kid's Shelled Snow Mocs (Cold Weather Booties; Infants, Toddlers, Boys & Girls) Nylon Rubber sole Infant sole 5", Toddler 5 3/4", Toddler+ 6.5" Thick 17 ounce fleece linings for warmth and comfort Velcro and elastic closures insure these booties cannot be kicked off Rugged "gripper" soles Waterproof breathable fabric