Features: 1.Ergonomic seat cushion for good seat comfort and easy air conditioning. Home car office chair wheelchair inflatable seat cushion relieves coccygeal back coccygeal hemorrhoids sciatica. 2.Used on a chair, it can relieve pressure on the tailbone, help correct poor sitting posture, and prevent bedsores. Use it as a back support pad to help relieve pressure on the sacrum and lower back area. 3.This inflatable donut pillow is suitable for wide application. It is suitable for various chairs such as office chair, wheelchair, home chair, etc. Perfect for home, office, study use. Also, it is portable to carry for travel, airplane, car, stadium and more. Specifications: Size: 45 x 39 x 11 cm, inner oval cavity, 19 x 16 cm Color: Grey Package Contents: 1 inflatable cushion Note: 1. Due to computers display colors differently, the color may vary slightly from the above images, Thanks for your understanding! 2. Manual measured, please allow 5-10mm error. - Havendro Inflatable Donut Ring Cushion Pillow Wheelchairs Seat Cushion in Grey