About this item 【Large and thick gel cushion】: This gel cushion for long sitting is specially designed large and thick,seat cushion size is 17 x 15.5 x 1.6inch,larger and thicker than most other gel cushions. ,The seat cushion is made of honeycomb structure, which greatly reduces the heat transfer between the hip and the seat, increases air circulation and keeps the bottom of the sedentary cool, it is made of highly elastic polymer material, double-layer design, softer, better elasticity and heat dissipation. 【Get the Pain Relief You Deserve】Desk chair cushion for long sitting,piriformis seat cushion.Our gel cushion is Perfect to help with lower back, sciatic nerve, tailbone, coccyx, butt and hip pain. Our seat cushion has an ergonomic design to help avoid numbness in the buttock’s muscles and lumbar strain. 【Super soft & hard to deform】: The gel chair cushion is highly supportive and very suitable for sedentary and obese people. In addition, it is characterized by high elastic gel material, it restores to its original shape as soon as it is stretched and squeezed,It has better usability than traditional cushions. 【Widely Application with Machine-washable Non-slip Cover】:gel seat cushion with Machine-washable zippered .he cloth cover has a zipper design. The seat cushion is taken out for washingwhich is easy for cleaning.The gel seat pad is light and portable .You can take them to your home, office, wheelchair,car, travel, stadium and movie theater. And it is small enough to carry to the airplane for long flights.