Jump boxes for safe plyometric training. This product is excellent for improving your explosiveness, endurance, strength, and performance. You can add jump exercises to your strength training or cross-training to enhance your overall fitness and performance. The product is equipped with Velcro straps to keep the boxes together. The box is specially made from hard, non-deformable, high-intensity foam to withstand the impact of jumps. The exterior of the box is made from high-quality materials that are particularly durable and easy to maintain. Many sports use this product for training: rugby, soccer, athletics, boxing, handball, CrossFit, hockey, and many others.