- [Material & Size] This adult booster seat cushion measures 38x38x10 cm (15x15x4 inches). It effectively elevates your driving view by approximately 12 cm (4.7 inches). Made from air layer fabric with PP cotton padding, this cushion offers a breathable and comfortable seating experience. Its thick and full design ensures durability, resisting deformation over time. Please note, the cushion is shipped compressed; upon unpacking, shake it to aid expansion, which will fully occur in 24-48 hours. - [Ergonomic Design] Featuring a specially designed groove in the middle, this cushion prevents slippage, keeping you securely seated. It provides exceptional support for your legs and back, whether you're driving, working at a computer, or relaxing at home. By raising your seating height, this booster seat improves your visibility on the road, making it ideal for shorter individuals who need a better line of sight. - [Multipurpose Use] The cushion includes a built-in handle for convenient transport, making it versatile for various applications. Use it as an office pillow, on rocking chairs, patio chairs, dining chairs, lawn chairs, camping chairs, or kitchen chairs. It also serves well as a recliner cushion, garden mat, or tatami mat, adapting to your needs in any setting. - [Relieve Fatigue] This ergonomic car seat cushion is designed to support your lower back and reduce strain during extended periods of sitting. It alleviates back fatigue and enhances comfort, making it perfect for long drives or office work. Ideal for anyone who spends significant time seated, this cushion ensures a more comfortable experience.