Review on Backjoy Posture Seat Pad: Ergonomic Pressure Relief, Hip & Pelvic Support for Improved Posture in Home, Office Chair, Car Seat - Core Lux Fit for M - XL Hips by Logan Goozmer

It's soft and comfortable but only works on flat, hard/hard surface. Do not buy if you think you can use it on other soft surfaces. I've used it on my office chair and it doesn't help at all. I've tested it on hard ground to prove it and it's working to correct my posture. If only I had known this limitation, I would not have purchased this item. waste of money. Now I understand the negative reviews from others saying it doesn't work.