Durable 3-Layer Design: This picnic mat features a thickened three-layer structure with skin-friendly polyester fiber on top, soft padding in the middle, and waterproof Oxford cloth on the bottom. Four weight pockets can be filled with sand or stone to keep the mat windproof and provide extra sitting comfort. Waterproof and Sandproof and Anti-stain: The waterproof bottom keeps you dry and free from sand, soil, wet grass, and dirty campsites. Easy to clean by shaking and wiping off dirt, mud, and sand. Oversized for 6-8 Adults: Extra large 80""x80"" size comfortably accommodates 6-8 adults with spacious room for family gatherings and safe play areas for kids and pets. Easy to Carry: Soft workmanship allows easy rolling without noise, stays secure, and fits conveniently in your backpack for travel anywhere. Multi Purpose: Suitable for parks, beaches, camping, travel, and parties, also works as an indoor game mat, crawling blanket, or emergency blanket. Weight: 1.52 pounds.