DENSER FLOOR RUG GRIPPER: Our felt (20 oz/sq.yd) is denser than others at the same thickness , providing better cushioning when you walk on hard floors. Such thick rug underlay prevents rugs from protruding too much over floors, so don't be more careful when getting in and out of the carpet. STRONG NON-SKID(FELT + RUBBER GRID) CARPET PAD: The plush surface of the upper felt locks the rug in place, and the lower rubber grid is great for gripping all kinds of floors, so the double-faced rug pad holds up firmly to your area carpet. It prevents slipping when you are walking or dancing on the carpet. SAFE FOR RUG & FLOOR: The denser floor rug pads can prevent rug from hard rubbing facing the floor and prolong the life of rugs. Due to backing rubber grid on the lower, air can circulate between rug and floor, and keeps the floor dry. On the other hand, the rug grippers can also add soundproofing and insulation, reducing indoor noise. PREMIUM 100% FELT FLOOR CARPET PAD: Our rug grippers are made of brand new, harmless and odorless felt, without using any recycled materials or coarse wool. Recycled material or shag is prone to moisture absorption and mildew in hot weather, and the lifespan of the rug pad will be short. EASY TO TRIM: The rug pad can be customized according to any requirement using scissors, and it can also be used for placemats, computer keyboard pads and various furniture pads.