1. Ergonomic waist support cushion， stretch the back， sit upright， comfortable office， available in all seasons. 2. The curved surface design fits the waist curve of the human body， aiming at the waist and providing strong support to keep the waist in a natural and comfortable state. 3. Space memory foam inner core， full support， three-dimensional support， not easy to deform， evenly distribute the force points， and take care of your lumbar spine. 4. Absorb the pressure of the human body and adjust the human body to a comfortable state. The slow rebound function can relieve and decompress more than the latex straight elastic. 5. The high elastic strap of the back buckle prevents the cushion from falling off the seat， the socket is easy to fix， and the sliding buckle is convenient to adjust the length， which is suitable for most seats.