This blanket is completely waterproof and sand proof. It can be used as a beach blanket, camping blanket, RV blanket, baby play mat, emergency blanket or throw blanket, it is the perfect choice for the park, the beach, sporting events, soccer games, tailgates, concerts, hiking. The outdoor mat is made from strong, durable, high-quality polyester, lining with foam and bottom covered with aluminum film. This sturdy blanket features ripstop and tear resistance.