Size: M: 23*28cm L:35*30cm XL:44*44cm Introducing our Extra-Large Thick Gel Seat Cushion, the ultimate solution for transforming hard seats into comfortable sitting surfaces. Thicker than most cushions, ours offers superior comfort, alleviating pressure, and making any seat more enjoyable. Our cushion features a unique double-layer honeycomb design with numerous vents for excellent airflow. This ensures superior breathability, reducing the likelihood of sweating, and keeping you dry and comfortable throughout the day. No more uncomfortable, stuffy seats. Ergonomically designed, our gel cushion evenly distributes your weight, creating pressure-free points. This promotes better blood circulation in the lower limbs, effectively relieves sciatica, and provides comfort for those sitting for extended periods. Crafted from high-quality, high-elastic gel material, our cushion excels in heat dissipation, offering a cool and comfortable sitting experience, especially during hot summer days. It also comes with a black non-slip cover, ensuring the cushion stays in place. Our versatile gel cushion is perfect for various settings, including offices, classrooms, homes, cars, wheelchairs, and any other hard seats. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.