I purchased this waterproof sheet after being recommended by a social welfare equipment 담당자 (tantosha, person in charge) for its quality and reputation among the many waterproof sheets available during my parent's home care. I was using the same product and bought this as a spare, but I kept it unopened at home because my parent moved into a facility. Usage Review: The wide tuck-in fabric securely wraps around the mattress, preventing the sheet from slipping. Also, the color of the denim changes when wet, making it easy to see, and I believe the three-layer waterproof structure helps prevent the mattress from getting wet. I've washed it quite a bit, and I feel it's durable. The fact that it's dryer-safe is also proof of its durability. I haven't opened it, and it's been stored at home for over six months. I have inspected it, but please consider that it's a layman's inspection. I'm selling it at a low price including shipping. How about taking this opportunity? ● Size / 90 x 170cm (Denim waterproof part 120cm) ● Material Surface Denim: 65% polyester, 35% cotton Surface Smooth: 100% polyester Middle Layer: Heat-resistant polyurethane laminate Tuck-in Fabric: 65% polyester, 35% cotton ● Country of Origin / China ● Machine washable ● Spin dryable ● Tumble dryer safe (120℃) ● Antibacterial treatment, waterproof treatment ● Manufacturer's product number / MT-7050 ● JAN code / 4580513161260 ● Manufacturer / Maruta Shirt ・3-layer structure, using durable denim material 3-layer structure of surface denim + polyurethane film + back smooth knit ・By sandwiching the polyurethane film in the center, it is more resistant to repeated washing and is a durable sheet. ・This product is heat-resistant up to 120℃, so it is also compatible with dryers. ・With a tuck-in fabric and a width of 170cm, it can be wrapped securely. ・It is less likely to wrinkle due to body movements such as turning over, and you can use it comfortably.