Rubber soleULTIMATE COMFORT – These slippers are made of high-quality and superior cotton-blend texture, combined with Waffle knit upper design, not only comfy but also breathable, which really make you enjoy the warm & comfy wearing feeling.NON-SLIP – Sturdy rubber sole is durable, anti-skid waterproof bottom grips the floor to keep you safe on wet tiles, even go outside wearing Voovix slippers to fetch the mail and walk your dog, allows you to move freely from bedroom to backyard or take a walk around your house.APPLICABLE – A good choice as bedroom slippers, house slippers in autumn and winter for your daily wear. Or a perfect gift for your father, mather, husband, wife, of course your best friends, by giving his or her tired feet a well deserved restCLASSIC MENS & WOMENS SLIPPERS – Origin two-tone style in 4 different color combinations (grey-red, grey-blue, black-red, blue-yellow), available in matching men’s and women??s house slippers for family and couples.MATERIAL – 95% Cotton / 5% Spandex, Rubber sole. Voovix slippers are quality & reliable. If you have any questions, please feel free to contact us, we provide 24/7 after-sales service.