It's not just a large picnic mat, you can use it indoor or outdoor, for beach blanket, camping blanket, RV blanket, baby play mat, yard blanket, waterproof blanket, emergency blanket or throw blanket. It is the perfect choice for the park, the beach, outdoor, fishing, sporting events, soccer games, concerts, hiking.Waterproof cushioned backing prevents you from getting wet from damp lawns or surfaces and provides extra sitting comfort. Waterproof, moisture proof, sand proof, wind resistance.