NWT Bombas Gripper Slipper, Youth Size 1-5 Half slipper. Half sock. 100% comfortable. We 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 help prevent slipping. Plus, every pair comes with a little travel bag that makes packing a breeze. Features: Stay-Put Grips Cozy Interior Lining Fold Flat for Easy Packing Cushioned Footbed Full Fabric Content Gripper Slipper : Shell - 50% Acrylic 30% Nylon 20% Merino Wool , Lining - 71% Viscose 25% Polyester 4% Elastane