HighlightsComfortable Memory FoamUnique Hollow DesignMemory foamWashable Mesh CoverFit Most Chairs and SeatDetails*Features* - *Comfortable Memory Foam* - Made from upgraded Space Slow-Rebound Memory Foam with 3.94in-thickness,our donut cushion provides exceptional support,which can recover to its original shape even after a long time seating and repeated use,and won't lose its support.*Unique Hollow Design* - With hollow design on the middle just as a donut,and curved slot design on the front thigh and back,which is able to ensure max breathability,provide great support for your thighs and buttocks,and evenly distribute weight pressure,helping to promote proper posture and spinal alignment.*Pain Relief & Great Gift* - Our reliable donut-design seat cushion filled in space memory foam is designed to help with pain relief and is a great gift for people who have long sitting time and driving time and who suffer from sciatica,herniated discs,tailbone injuries,hip pain,hemorrhoids and numb