Dimensions and Package Contents: These yoga sandbags are suitable for the whole family. Package contains 6 inner bags and 3 different sizes outer sandbags. Sandbags are suitable for all fitness levels: training sandbags, yoga sandbags, fitness sandbags, and boxing sandbags, suitable for beginners, intermediates, and even experts. Sand is not included.Durable Fabric and Reinforced Double Stitching: These fitness sandbags are made of extra-strong weighted Oxford cloth and reinforced with double stitching for unparalleled durability. These black outdoor weighted sandbags have excellent tensile strength, making them flexible and tear-resistant.Strong Hook and Loop Zipper: Each sandbag features a built-in stuff sack, an easy-open zipper, and a hook and loop fastener to ensure the bag's fill remains completely sealed during training. This versatile sandbag also features a zipper for easy filling and removal.Easy to Carry: Compact and lightweight, these sandbags are a perfect alternative to traditional fitness equipment and can be taken anywhere. You can even carry them in your outdoor backpack. Whether you're at the gym, sports field, beach, park, or anywhere else, it's easy to start your workout.Easy to Use: All you need is a sandbag. You can carry a sandbag in your outdoor backpack, especially at the beach. Filling your bag with sand adds a touch of fun to your beach activities. When you're done, simply empty the sandbag. Sandbag training works the different muscle groups involved in lifting and carrying the bag's weight, while also improving core stability and strength.