Purchased May 2023. Selling because it's not used often. No sagging. Outer cover has been washed. The core material is 0.5cm thinner than the current product. Seat: 3cm, Backrest: 2cm Likely a product from before the renewal. 【Washable and Clean - Supports Back, Waist, and Hips】 Simple design that suits various settings, such as office chairs, dining chairs, and living room sofas. Folds in half for compact storage, Also useful for long journeys on airplanes and bullet trains. ＜Airweave Technology in a Cushion＞ ・Moderate resilience supports the back, waist, and hips, preventing sinking. ・Excellent pressure distribution reduces fatigue and pain from prolonged sitting. ・Excellent breathability prevents stuffiness, recommended for seasons when cushion humidity is a concern. ・Both the cover and the inner material are washable. Width: Approximately 40cm Length: Approximately 80cm Thickness: Airfiber Seat: Approximately 3cm, Backrest: 2cm Airweave airweave non-spring