Material: PP Main body size: Concave type (approx.) 36.5 x 32.5 x 28.5 CM; N-type: 23.5 x 34 x 27 x 27 CM Weight: (approx.) 1kg Purchased on Amazon for 5,699 yen and used for 2 months for my parent's care. It is no longer needed, so I am listing it for sale. Features: The groove design is comfortable and non-slip (photo 4), has good load-bearing capacity, and is strong and durable. It allows you to wash your delicate areas while sitting without lifting your hips. It can be used by various people, including the elderly, children, and pregnant individuals.