Washable and, Replacement refunds These grippers are easy to clean and can be machine washed together with the rug without affecting the adhesion Package include 4pieces Vacuum Technology Design This gripper can easily stick under any flat carpet BUT DO NOT USE ON CARPET FLOOR We use Vacuum Suction to ensures a firm grips on the floor and keep your rug in place, stop curling and slipping ( Make Sure your Floor is Clean and Dry before using The carpet tapes add extra comfort underfoot due to the slight elasticity of the vacuum technology selfs-Adhesive not Glues not Damage to Your Floor] Our Rug Pad Gripper is and peeling off, with not residues or glues peeling off the backing sticker and stick the rippers on the rug, then press gripper firmly onto the floor The unique vacuum technology makes it easily peeling off from the floor, without harming your floor Thin and Invisible it is not obvious after installation, and does not affect the beauty of your carpet Wide ranges of applications, use on area rugs, bath rugs, kitchen rugs, or child rugs in living rooms, bedrooms, and so on