Size: 30 * 14 * 57cm Sandbag Sled Trainer: It can help train sprinters, football players and other athletes to strengthen lower limb strength, improve speed and explosive power, leg strength and endurance Durable and moisture-proof: Made of thickened PVC material, the surface is waterproof and moisture-proof, and both the sled and weight bags are made to handle rapid changes in resistance and direction, both externally and internally, to meet all your training needs Adjustable weight: It comes with three detachable weight bags, each of which can be filled with 10 pounds of sand, and these bags do not come with sand/pre-weighted, so you can load 10-30 pounds to meet your workout needs. Multi-directional training: Multiple-directional training can be performed to improve strength and flexibility in any direction, giving you more freedom when exercising. The belt size is adjustable, and the belt lining is comfortable, soft and breathable, suitable for exercisers of different body shapes. Multi-purpose: The MIMIGO weighted sled allows you to intensify your sprint training and make it more fun. Add hills, changes of direction, rows, drags, and more to your sledding workouts to get the benefits of a full-body workout from this versatile piece of equipment