Made of 3 layers material, the waterproof blanket for outdoors is more thicker and durable than other 2 layers. Adopt ultrasonically quilted technology, the layers can't slide on each other and water won't leak through.Top fabric is polyester, wear-resistant and sof. Middle is spray-bonded cotton, you will feel very comfortable when sitting or lying on the Extra Large Picnic Blanket. Bottom is aluminum films, has super waterproof performance, you won't feel damp or cold even on wet grass.Provide enough space for family gathering and a safe and cozy area for your kids and pets to play on.backing is easy to wipe clean with a wet cloth and easy to shake off the sand after used at the beach. With a handle, can be easily folded, convenient to take it anywhere.