Abstract: A beach blanket system. The beach blanket system includes a flexible body having a plurality of perimeter edges. Side channels each having a pair of opposing open ends are disposed on the flexible body along each perimeter edge. One or more corner pockets may be disposed in corner portions of the flexible body. The beach blanket system further includes a plurality of sleeves, each sleeve having an open end and a closed end, such that each sleeve is configured to receive and retain particular matter therein. Each sleeve is removably securable within one of the side channels. In operation, the sleeves can be filled with sand or other material and be inserted into the side channels to weigh down the flexible body and prevent unwanted movement of the beach blanket.