Material: XPE; Weight: about 40g; Size (approx.): foldable: approx. 140 * 80 * 60mm / 5.5 * 3.1 * 2.3in; Unfold: about 385 * 275 * 80mm / 15 * 10.8 * 3.1in. Dam-resistant mat With waterproof and moisture-proof design, ideal for outdoor activities . Foldable design, very convenient to store. Lightweight and portable, easy to carry. Foldable and strong and durable - this updated version of the foam seat cushions can be folded into 8 indivisible parts. The fold has been designed to prevent tearing and can be folded 100,000 times. These foam cushions are suitable for hiking, sports, picnics, backpacking, backpacking, fishing and other outdoor sports. Outdoor mats are soft, dry and warm. Guarantee: If you are not satisfied with our product received, you can email us at any time. We will respond to you immediately and help you solve your problem.