Ergonomic Memory Foam: Designed to adapt various body shapes, this cushion relieves pressure on the tailbone and thighs, improves posture, and supports better blood flow during long sitting hours All-Day Comfort for Hard Chairs: Soft & durable 2-inch-thick cushion that evenly distributes weight, reduces discomfort, and brings comfortable sitting experience on hard surfaces. Can be used on chairs, beds, sofas & hard floors Breathable, Stretchable Fabric Cover: Comes with a soft nylon-spandex outer cover that’s breathable and stretchable; Keeps you cool and comfortable during extended use without causing sweat or irritation; the outer also has a hidden zipper which make it easy to remove and is also washable Anti-Slip Base & Carry Handle for Portability: Bottom layer features a non-slip grip that keeps the cushion in place on any surface such as chairs, car seats or hard floors; Integrated side handle allows easy carrying wherever you go Universal Fit for Multiple Chairs: Sized at 18" x 18", this cushion fits most office chairs, car seats, dining chairs and wheelchairs; Lightweight and travel-ready for convenience on the go