K2 FSI is the innovator of specialty sandbag training. We were the first to commercially market sandbags and have refined our designs over 8 years. Our BodyBags are the finest quality sand bags you'll find anywhere in the world. They were specifically designed for odd object lifting, by people who do odd object lifting. These sandbags are strategically reinforced, double-stitched and specially constructed from top-grade, heavy duty canvas. Double strength material has been added on the ends to provide a gripping surface, and an 18 inch industrial grade zipper, with canvas covering, along the top for quick filling.