Weight: 5 KG. At first glance, the weighted bag may look like a boxing punching bag, but it's actually much more than that. This rather special bag replaces weights and allows you to perfect and complete your cardio exercises. All the lifting exercises you normally do with weights can be considerably intensified with this type of bag. By training with a weighted bag, you'll improve your balance and become able to transfer your energy efficiently, even when performing complex sequences. Thanks to its physical response system, you'll be able to develop better-quality movements. It's an excellent tool for improving coordination, balance, endurance and strength. Main features: Different weight categories: 5 kg, 10 kg, 15 kg, 20 kg, 25 kg, 30 kg. Filling: metallic sand, fabric. Outer material: nylon and imitation leather. How exactly does the fitness sandbag work? The metal sand filling inside the weighted bag shifts randomly during training. This imbalance means you have to constantly re-stabilize yourself. This met puts a strain on the muscles, as working with a weighted bag puts a huge strain on the stabilizing muscles during each exercise. For optimum comfort, the bag is padded and the seams are reinforced. So you can easily use it, whatever the circumstances, for indoor or outdoor training. A difference in color intensity may exist between the photo and the article.