Sound Insulation and Warmth】Our stair anti-slip mat is made of polyester fiber on the front and reusable viscose on the back. It is only 2mm thick, but the sound insulation effect is still very good Luminous Design Stair Treads Carpet】The luminous carpet glows at night with a variety of printed patterns, you can see the stairs in the dark, and it is also a wonderful decoration for the stairs Suitable Pre-cut Size】55cmx22cm/8.6" X 21.6" for each piece, and 15 pieces in pack. The size fits most indoor stairs and the quantity meets the needs of most families. Even if your step size is kinda special, you can easily cut the carpet tread with scissors Easy to Install or Remove】These stair treads mats are incredibly easy to install, and you don’t need to use permanent adhesive (Such as double sided tape) that leaves a sticky residue on your staircase. Just peal off the clear protection and place them on the stairs, they stay as they are placed Our carpet stair mats feature a non-slip backing, which helps to keep them firmly in place and prevents them from shifting or sliding.