For sale: a high-resilience mattress and waterproof sheets purchased in October 2025 for my beloved dog. The mattress was always used with a waterproof sheet, so I believe it's in good condition with minimal signs of use. At home, we used two size M mattresses side-by-side, creating a 120x120cm area, and I also purchased waterproof sheets of that size separately. One of the waterproof sheets is unused, and the other has been used a few times. ① High-Resilience Mattress 【Size】M size W1200 x D600 x H30mm 【Cover】100% Polyester 【Core Material】Plastic Resin 【Brand】SLEEPY 【Purchase Price】12,980 yen (6,490 yen x 2) 【Features】Foldable in two 　　　Core material can be washed with water 　　　Outer cover can be hand-washed ② Waterproof Sheets 【Size】120 x 120cm 【Material】100% Cotton (pile part) 【Purchase Price】4,360 yen (2,180 yen x 2) Please also check the profile section before purchasing. (^^)