INCLUDES: 1 x Sandbag1 x Training Guide ebook6 x Filler BagsSand Not Included** **There are a number of different types of sand. Play sand is common but is not particularly dense. Please use a heavier, denser type of sand to attain full weight. RUBBERBANDITZ WORKOUT SANDBAG Bring Your Training to the Next Level Easily manage the weight distribution across your bag by adding or removing the six filler bags that come standard with each purchase. Filler bags hold up to approximately 8-9 lbs (medium bag) or 16-20 lbs (large bag) of sand depending on the sand. Simply fill each of the bags with dry sand and use the double-latching velcro flaps to seal the bags. Easily add or remove individual bags to seamlessly adjust the load in your bag during your workout. Versatile & Optimized Design Every weight lifting bag is engineered with seven strategically placed handles to allow for a variety of high and low repetition workouts. Reinforced Construction PVC-enhanced fabric weight bag is soft on the skin but durable to withstand brute force. At high-impact points, all seams and nylon straps are reinforced and includes solid metal zipper. Break-Proof Rucksack Weight Bags All filler bags feature ripstop stitching and a double-layered velcro closure. This prevents bursting, provides an airtight seal, and makes adding and removing filler bags simple and easy.