Introducing the KingsBox Hybrid Strongman Bag – the perfect sandbag for your strongman training! With weight size options of 30kg, 40kg, 75kg and 100kg, this bag is made from high-quality double-stitched nylon for extra durability. This hybrid bag is ideal for all levels of strongman training, from beginner to pro. Get yours today and take your training to the next level. It comes empty, so you can fill it with the fine sand of your choice. Do not use wet sand for filling the sandbags, as the dampness can cause mold growth.