Material Driver booster seat made of air layer fabric with PP cotton padding. Breathable, soft and comfortable, thick and full, not easily deformed. Size and expansion Cushion size: 15.7 x 15.7 x 4.7 inches. Suitable for people of different heights, including shorter users. compressed. Remove the package and shake it to help expansion. Fully expands in 24–48 hours. Ergonomic design Middle groove design helps prevent sliding and provides a nonslip surface. Supports the legs and back whether in the car, at a computer/desk, or at home. Portable multipurpose Builtin handle for easy transport. Can be used as an office pillow, rocking chair pad, patio chair pad, outdoor chair pad, dining chair pad, lawn chair pad, camping chair pad, kitchen chair pad, and also as a recliner cushion or garden mat. Use scenarios Incar: use as a driver booster seat to gain height and improve posture on long drives. Office or home: place on a chair to enhance back and leg support during computer work. Outdoor and dining: suitable for patio, lawn, camping, dining, or kitchen chairs, and can double as a garden mat.