Purchased in May 2021 for 5500 yen. I'm selling it because I haven't used it much. The cover has been home cleaned. ◇◇◇The following is quoted from the purchase site◇◇◇ A new 3D type! The 3D gel structure fits the shape of your buttocks and thighs! It gently wraps and supports the correct posture. Supports the pelvis just by sitting naturally. Beautiful posture without straining. ＜Specifications＞ ●Set includes: Main unit, cover ●Size: (approx.) 46 x 40 x 6.5cm (when cover is attached) ●Material: Main unit = TPE (Thermoplastic Elastomer), Cover = 100% polyester ＜Country of origin＞ Made in China ＜Washing instructions＞ Hand wash (cover only) #GEL #Pelvis #RingCushion #Cushion #Hanenite #Navy