[Size Upgraded] The unfolding size of ergonomic hiking seat pad is approximately 17.713.7 inches (4535cm),the area is at least 30% larger than old style,suitable for most adults men,women and kids [3 Layers Disign] Camping foam seat pad has 3 layers:Oxford fabric on the front,the back is Oxford cloth coated with waterproof layer,the filler is waterproof,moistureproof and excellent resilience material pearl cotton(EPE) [Lightweight and Portable] Foam sitting pad is very lightweight,no peculiar smell,moderate size,only about 2 ounces/1pcs.Folding design takes up less room,equipped with Oxford cloth storage bag,easy to carry and store [Universal Accessory] Moisture-proof cushion mat perfect for outdoor activities,you can use it everywhere,ideal for camping, mountaineering, backpacking, trekking, fishing, outdoor activities, park picnic, hiking.You can also use it in stadium, concert, patio ,grass, floors, beach, bus, train, kayak and park pews