Power BagsSMAI's range of Power Bags has everything you need to get the job done. If strength is what you're after, our Sand Bags are ideal for building your core and increasing your overall strength and stamina. If you're more into fitness, our Anacondas and Core Bags are perfect for sculpting your body into shape. SMAI has an extensive range of Power Bags. Including Sand Bags, Strongman Sand Bags, Core Bags, 4-8 people Anaconda Loadable Sand Bags and much more.