100% WATERPROOF Sunday Slippers Our versatile slippers sport a collapsible heel and waterproof vegan wool for sustained warmth and comfort, inside and out. Keep your feet dry with our newest 100% waterproof Dyma-wool® technology, engineered with thousands of nano-sized pores small enough to keep water out but large enough to let sweat and heat escape. The Sunday Slippers feature our first ever Dyma-wool® waterproof material - a vegan wool designed for ultimate lounging, at home or on-the-go. Our Sunday Slippers sport a collapsible heel for maximum comfort and convenience, whether you're running errands or lounging at home. Join the Dry Socks Club