**80" x 80" Extra Large:** Measuring 80" long and 80" wide, this picnic blanket comfortably accommodates 6-8 seated people or 4 lying down. It's spacious enough for family use or picnics with friends. When rolled up, it forms a compact cylinder, only 16 inches long with a 9-inch diameter. **Sandproof Picnic Blanket:** This picnic blanket is an excellent choice for the beach, park, or bleachers, thanks to its PEVA waterproof and sandproof backing. You can easily shake off dirt, wet grass, and beach sand. The blanket is designed to keep out moisture, ensuring a more comfortable seating experience. **3-Layer Comfortable Structure:** The blanket features a three-layer construction: acrylic fiber on top, foam in the middle, and a waterproof layer on the bottom. The top layer is soft enough for comfortable sunbathing and gentle enough for a baby to lie on. The foam middle layer provides added comfort, even during extended picnics. The waterproof bottom resists dirt, sand, and water. **Foldable and Portable:** Despite its seven-layer construction, the picnic blanket is lightweight and designed for easy portability. It can be packed in a classic roll-up style, secured with the included adjustable belt, which also features a hand strap. This makes it easy to carry the blanket anywhere. **Designed for Outdoor and Indoor Use:** The Sapsisel picnic blanket is perfect for relaxing both indoors and outdoors, combining comfort, durability, and compactness. It's ideal for picnics, camping, hiking, climbing, beach outings, grass, parks, outdoor concerts, and also serves as a great playing mat for indoor and outdoor use.