This picnic mat features a durable 3-layer thickened design, unlike standard 2-layer options. The top layer is smooth, skin-friendly polyester fiber, the middle is a soft cushioned pad, the bottom layer is waterproof Oxford cloth. Four built-in weight pockets for sand or stones keep the mat steady in windy conditions while adding extra sitting comfort. It is fully waterproof, sandproof, stain-resistant: the waterproof base prevents you from getting wet by damp ground or beach sand, blocks contact with dirt, wet grass, messy campsites. Cleaning is simple too-just shake or wipe away dirt, mud, sand, grass clippings. Spacious enough to comfortably fit 4 to 6 adults, it provides ample room for family gatherings and safe, cozy play for kids and pets. Available sizes: 5' X 6'8"" (Rectangular), 6'8"" X 6'8"" (Square). Available colors: A01, A02, B02, C02, C03