Features: Engineered with memory foam and 3D breathable structure, this seat cushion delivers optimally lumbar support while maintaining 85% airflows efficiency to keep you cool during extended sitting. The orthopedic design features a 15° ergonomic curved for thigh relief, medium firm (Shore A 45±5) zoned support to redistribute hip pressure, and antislip dots that grip securely on any chair surfaces. Ideal for students, office worker, and drivers who spend 6 hour seated daily, it effectively reduces sciatic nerve pressure and prevents slouching through clinically tested posture correction. Use this cushion on plastic classroom chairs, car seat, wooden dining chairs, or outdoor decolorant, its foldable 35x35cm design slip easily into backpacks for library study breaks or commutes. With odorlessly foam and machine washable mesh cover, this double purpose car seat pad/desk chair cushion combines therapeutic support with easy maintenance for year round comfort. Specifications: Component:Memory Sponge Size: Approx.35x35x3.5cm Color:Black/Gray/Purpleness/Pink Package Includes: 1pcs Memory Foam Seat Cushion note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.