Half slipper. Half sock. 100% comfortable. Bombas made these Gripper Slippers with a new and improved fit that’s still super cozy. They also have a soft brushed lining on the inside to keep you toasty, and special grips on the outside to keep you from slipping. Fit & Design: PVC grippers at the base to prevent unwanted slipping and sliding around on slick surfaces A super soft, brushed interior lining feels fuzzy and warm, like your favorite blanket A special elastic band at the heel helps create a snug, non-slip fit that keeps slippers perfectly in place Additional Details: Machine wash cold on gentle cycle, Only non-chlorine bleach when needed, Tumble dry low, Do not Iron, Do not dryclean Fabric: Outer, 50% Acrylic, 30% Nylon, 20% Wool, Lining, 72% Rayon, 22% Polyester, 6% Spandex, Eco-PVC Gripper