Special Flex Support Cushion Supports Your Backside And Spine So Well, You Can Sit On An Egg Without Breaking It – No Other Seat Cushions For Chairs Can Make That Promise! Unlike Your Memory Foam Desk Chair, Sciatic Nerve Pillow, Or Foam Cushion, Egg Sitter’S Unique Flex-Grip Honeycomb Design Allows Air To Circulate And Stays Cool To The Touch Strong And Durable, Egg Sitter Retains Its Shape, Making It A Great Back Pain Seat And Orthopedic Seat Fits Most Chairs For Deep Seat Pressure Relief – Egg Sitter Measures 15-Inches X 16.5-Inches Includes 1 Egg Sitter Seat Cushion And Non-Slip Cover