Purchased on Rakuten and used under a carpet for about two years. Compared to when it was new, there may be some wear and tear, and the pile may be flattened in places. The non-slip side has some fluffing. I bought a thick type, but I didn't feel it was that thick from the time of purchase. Regarding soundproofing, I think it had some effect. For those who understand that it has been used. As a bonus, if you'd like, I'll include a non-slip mat (approximately 180 x 250 cm, not the exact size) to put under the rug, as shown in images 8 and 9. It's from Nitori. Part of it has been cut. Please consider it as a bonus. Quoted from the purchase screen below: Soundproof, fluffy underlay rug, Fukapita PLUS [Thick] 170 x 170cm for 2 tatami mats 1K ◆ [Patent No. 6369846] Separate rug, non-slip, carpet, living room, autumn and winter, mat, floor heating compatible, thick