Gripper Slippers have an ultra-warm brushed lining and special grips on the outside designed to help prevent slips. You may never want to wear real shoes again. While our grippers are pretty good at helping prevent slips, they’re not magic. So be careful, and practice good coordination out there. Features Comfort Cushion Comfort Cushion Stay Put Grippers Stay Put Grippers Fold Flat for Easy Packing Fold Flat for Easy Packing Cozy Interior Lining Cozy Interior Lining Full Fabric Content Adult Gripper Slipper : [Shell] 50% Acrylic 30% Nylon 20% Merino Wool [Lining] 71% Viscose 25% Polyester 4% Elastane These were only used for 2 months, and washed. Size M 7-9.5 They look like a mushroomy brown.