Road visibility enhancement for short drivers: When seated low, your line of sight is limited. This car booster seat cushion raises your position to widen your field of view, helping you clearly see road conditions and increasing the overall driving awareness. Memory foam wedge seat pad for lumbar support: Acts as a lumbar backrest cushion to help reduce back strain and support proper posture, contributing to longterm comfort during extended or daily use. Antislip and secure design: The bottom uses quality nonslip material to prevent movement and protect the car seat from damage. An elastic strap at the bottom enables easy transfer and secure fastening on office chairs as well as during travel, supporting tailbone comfort. Lightweight, portable, and compact: Durable and comfortable with a size of 44 x 22.5 x 10 cm. Foldable and lightweight for easy carrying, and compact enough to store when not in use. Use scenarios: Daily driving for shortstatured adults: Install to elevate seating height for improved road visibility and safer driving. Long drives or commutes: Provides lumbar support and reduces back fatigue on extended journeys. Office or travel use: Secures easily on office chairs and during travel to alleviate tailbone pain and enhance seated comfort while on the go.