Waterproof and Sandproof Picnic blanket: The picnic blanket is great choice for beach, park, or bleachers thanks to its PEVA waterproof and sandproof backing. You can easily shake and wipe off dirt, wet grass and beach sand. The picnic blanket is designed to keep out the moisture and make you seat more comfortable.3 Layers Comfortable Structure: The Acrylic fiber on the top, foam in the middle, and a waterproof layer on the bottom. The top layer is soft enough to let you comfortably nap in the sun and gentle enough for a baby to lie. With the foam in the middle, you wont feel uncomfortable even if you picnic for a long time. The waterproof bottom resists dirt, sand and water.80 x 80 Extra Large: With 80 long and 80 width, the picnic blanket can allow 6-8 persons to sit on, or 4 persons to lie on. Its large enough for family use or picnic with several friends. And its just a 16 inches long cylinder with a 9-inch diameter when you roll it up.Designed for Outdoor and Indoor Use: It's suitable for going out and relax on the picnic blanket, which offers the best combination of comfort, durability and compactness. Designed for picnic, camping, hiking, climbing, beach, grass, park, outdoor concert, and its also great to use as playing mat for kids indoor and outdoor.Lightweight and Foldable: The picnic blanket has 7 layers doesnt mean its heavyit has a lightweight design, so its designed for carry around. This park blanket can be packed as a classic roll-up style, you can pack it easily with the adjustable belt which comes with the picnic blanket. The belt also has a hand strap. Itll be easy to take this blanket anywhere.