1. 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. It's large enough for family use or picnic with several friends. And it's just a 16 inches long cylinder with a 9-inch diameter when you roll it up. 2. 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. 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 to lie. With the foam in the middle, you won't feel uncomfortable even if you picnic for a long time. The waterproof bottom resists dirt, sand and water. 4. and Foldable: The picnic blanket has 7 layers doesn't mean it's heavy—it has a lightweight design, so it's 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. It'll be easy to take this blanket anywhere.