Sandbags with their ever-shifting sand inside can be your next best trick! By battling and stabilizing the shifting sand throughout various movements, known as dynamic resistance, you can expect to get a plethora of fitness benefits. Training with sandbags can also help increase the utilization of core muscles, strengthen torso and hips, which always help in both your daily life and athletic performance. Using sandbags can help you learn to brace and stabilize when lifting and moving odd objects, which will transfer into daily life where most things lifted are not advantageous to lifting like in gym environments. With Yes4All Sandbags, choosing the perfect bag for your fitness level and training goals has never been simpler. Made of 1000 Denier (1000D) Coated CORDURA Nylon Fabric, strong stitching especially X-shaped stitches at core points and zipper closure to ensure durability and performance. Further equipped with strategically placed comfortable handles, our sandbags offer greater opportunities for even more various workout moves be it Lunges, Deadlift, Squat, Burpee, Snatch, Spider, Overhead press, Hammer curl, Crossfit and many more. Material: 1000 Denier (1000D) Coated CORDURA Nylon Fabric Colors: Black, Green, Camo Weight options: S – 5-25 lbs, M –25-75 lbs, L –50-125 lbs & XL –125-200 lbs Sandbags inside for easy customization of weight: S – 1 small inner bag, M – 1 small & 1 big inner bag, L – 3 big inner bags & XL – 4 big inner bags (sand not included) Warranty: 1-year warranty and 30-day return (contact seller for more information)