Sled Running Training Used for Speed Training for Sprinters with 3 Weight Sandbags Name: Loaded sandbag Size:57*30*14cm (22.4x11.8x5.5in) Colour: Black Material: PVC Folded size: 40*32*4cm Weight:600G Dimensions are measured manually, there may be slight errors, please understand. Using this running weight bag allows you to drag the weight in the bag, which can improve speed, explosive power, leg strength and endurance The speed training bag is a bag you drag on the ground. It comes with 3 inner bags, and each bag is filled with about 10 pounds of sand. You can adjust the weight between 10-30 pounds. The weight-bearing training bag does not contain sand, you need to fill the inner bag with sand. It has a Velcro closure and a webbing handle to prevent hourglasses and is easy to carry. The sprint training sandbag is designed with an adjustable waist belt, which is designed for users of different sizes, suitable for all kinds of body shapes. Your satisfaction is very important to us. If you are not satisfied with the product, please feel free to contact us, we will provide you with a satisfactory solution within 24 hours.