This is an authentic product used in dance studios and sports gyms. Also effective for vibrating sounds of piano and drums. You want to eliminate anxiety about downstairs. The definitive solution for soundproofing and vibration reduction on the floor. The soundproof mat ZS has elastic rubber and has moderate air gap inside, which greatly reduces the impact of floor noise. It greatly improves the mass (sound insulation) and vibration dampening, making it a great soundproofing mat. Recommended for people who are thinking of vibration dampening and soundproofing houses and apartments. Those who want to reduce shock noise for children such as playing musical instruments, exercises, etc. Prevents mechanical vibration sounds. Can be cut to any size with a cutter. Just place it on top of your flooring or under your carpet or carpet, so it is easy to install by women on your hands. Even if placed underneath tatami mats, it also has a vibration damp■ Size per sheet is 35.8 x 35.8 inches (910 x 910 mm) (approx. 0.5 tatami mats) ■ 4 types of thickness is 0.2 inches (5 mm), 0.4 inches (10 mm), 0.6 inches (15 mm), 0.8 inches (2Please choose according to your needs.