Our durable Teflon-coated waterproof breathable nylon shelled booties with 16/17 oz non-pill fleece linings, hook-and-loop closures, clips and "gripper" soles are functional and warm. Easily coordinate these shelled mittens and booties with any of our shelled outwear!  A great way to keep your twins warm on a cold winter day or at the ski moutain.