Rubber sole ULTIMATE COMFORT - The High-density memory foam insole makes these slippers soft and cushioning, let your every step like walking on the cloud. Moreover; the heel collar and breathable woolen fabric upper will mold to your feet and provide a customized fit for you. The skin friendly and soft fleece lined provide you next-to-skin comfort to keep you warm and comfy. Easily slip on whenever you want your feet relaxed. HIGH QUALITY & EXCELLENT TRACTION: The High-quality breathable woolen fabric upper is around the slipper which increases durability of the slipper. The durable non-slip rubber sole with obvious pattern provides excellent traction and stability for all surfaces and terrains. Environmental friendly and waterproof sole offers you an anti-slip protection. SOFT LINING: Skin-friendly and moisture-wicking soft lining which really make you enjoy the comfy wearing, slip on these house slippers, totally relax your feet after a long day work. ALL-PURPOSE & EASY MAINTENANCE: The easily slip on slippers with breathable open back make the house slippers perfect for indoor and outdoor use whether having a rest in bedroom. The low back heel designed with durable non-slip rubber sole make these slippers to be a good option as house slippers, bedroom slippers, winter slippers and indoor outdoor slippers for your daily wear. Moreover, they are both hand and machine washable (Machine wash with a laundry bag).