LARGE SIZE - Gel seat cushion measuring 40 x 37 x 4 cm. EXCELLENT BREATHABILITY - The gel seat cushion has a honeycomb structure that allows air to circulate and has excellent breathability. Even if you sit for a long time, it remains cool and comfortable. The gel seat cushion's base with a groove design can provide maximum support and comfort while reducing stress, which can relieve lower back pain, sitting posture, sciatica, wrinkles, and pelvic problems caused by prolonged sitting. SUPER SOFT GEL CUSHION - The gel cushion is characterized by highly elastic gel materials; it can return to its original shape even if stretched or squeezed, which is more durable than ordinary cushions. The gel cushion has a non-slip fabric cover. It can be stably attached anywhere and does not fall off easily. LIGHTWEIGHT AND PORTABLE - Gel seat cushion with machine washable zippered cover that is easy to clean. The gel cushion is lightweight and portable. Suitable for various uses: home, office, car, travel, stadium, wheelchair, etc. PERFECT GIFT - The ergonomically designed keeps the tailbone elevated above seating surfaces, relieving pressure along the back and legs. Suitable as a Christmas or birthday gift for yourself, family, seniors, and bosses.