Camping Picnic Blankets is made of 210D silver-coated Oxford cloth, which is durable and easy to use. The picnic blanket is completely waterproof and sand-proof. This large picnic blanket provides excellent protection against grass, sand, dirt and rocks. Each mat is added with a portable carrying bag, which is very convenient for storage. When you are picnicking, camping and hiking, this waterproof picnic blanket is perfect for family and friends.