Sandbag training is a core of functional fitness. The Ader sandbag is made of heavy-duty nylon and zippers along with handles in all the right places. Add weight to your Ader Sandbag by using additional Ader Sandbag Filler Bags. Sandbag Fillers make adjusting weights in your sandbag easy and fast. Sandbags are designed for the toughest workouts. Movements such as cleans, front squats, back squats, thrusters, and many more allow you to get a full-body workout with this one piece of equipment.