16.5"L x 16"W x 2"H, include 1 count seat cushion. Surface: Air Mesh. Inside: 100% Polyester. Bottom: Fabric with Silicone Anti-Slip dots. * Compact Package: With excess air and water removal, these small differences in product size and weight lead to significant carbon emission reductions. The cushion will return to its original shape after a few minutes. Machine washable and will not appear pilling situation. The bottom fabric is made of silicone dots for a non-slip effect, rather than the cheap PVC dots available on the market. Used on furniture like chairs, stools, and floors. All-around office, cars, patios, cafés, shopping malls, restaurants, dining rooms, kitchens, etc.