Positioning Cushion & Backrest Cushion Product Description (excerpt from leaflet) 25D High-Resilience Urethane Material Removable and washable cover 【How to Use】 ⭐︎The backrest combines three cushions, and the position can be adjusted with Velcro. ⭐︎A set of 4 pieces: backrest and leg pillow, can be used separately wherever you like. ⭐︎Non-slip silicone on the bottom prevents the pillow from slipping during sleep. 【Wide Range of Uses】 ⭐︎Napping, smartphones, TV, reading ⭐︎Heartburn, acid reflux ⭐︎For those who need to sleep with their upper body elevated 【Notes】 ⭐︎This product is not a medical device. ◉Please see photo 8 for the size. ◉I purchased this product online in May 2025 based on good reviews. I tried it once with a bath towel, but I wanted to use it at a lower position, so I haven't used it since. ◉It will be shipped in a vacuum-sealed bag for futons, so please open it promptly upon receipt. ◉Since it has been opened once, please refrain from purchasing if you are concerned. No pets No smokers #TriangleCushion #Backrest #AcidReflux #NursingCareSupplies #PressureSorePrevention