I purchased this in August 2025, but it's become unnecessary as I've never used it, so I'm putting it up for sale. Product Name: Air-Fi Magical U-Shaped Cushion Size: Diameter 40 x Height 7.5cm Color: Dark Gray & Gray (Mesh x Air Knit) Fabric: Fiber Cushion, Mesh Fabric Same specifications as those used in hospitals. Velcro prevents the U-shape from spreading, preventing the affected area from touching the seat. ************ The following is an excerpt from the seller's website: For postpartum and post-surgery pain relief! This is a LOOKIT original U-shaped cushion developed based on customer feedback. It achieves the same specifications as those used in hospitals! It has an adjustable belt for a perfect fit to your buttocks. The extra-thick 7.5cm cushion is designed to avoid contact with painful areas when sitting. Furthermore, a breathable fiber type is also available! The cushion uses the new Air3D fiber material, and the cover uses mesh fabric. Both the cushion and cover are washable, so you can always keep them clean.