Soundproofing Specialist Pia Living Soundproof Mat Soundproof Sheet Footstep Mat Thickness 7mm 100cm x 50cm 10 Sheets Made in Japan Vibration-Proof Mat Sound Insulation Mat Soundproofing Material Vibration Control Noise Reduction Floor Impact Absorption Footsteps Children Pets Piano Strongest [Size] 1000mm x 500mm [Thickness] 7mm [Weight] 760g/sheet [Density] 220kg/m3 [Quantity] 6 sheets [Material] Polyester, Polyethylene [Building Standard] F☆☆☆☆ Used for about 2 years. Following the installation method on the official website, they were connected with cloth tape, so adhesive residue remains where the tape was removed. They will be folded for simple shipping. There are large adhesive marks and fluffing, so the condition is not necessarily good. There are no smokers or pets. Please understand that these are used items before purchasing.