About this item:【Large and thick gel cushion】 This gel seat cushion for long sitting is specially designed large and thick,cushion size is 42*36*3.5cm, weight about 973g.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.【Super soft & hard to deform】 Our seat cushion has cushioning property that it does not broken even if you put an egg and sit down. In addition, it is characterized by high elastic gel material, it restores to its original.