1,Convenient & Portable Size The Weight Bag measures inches and weighs 18 lbs when fully weighted, it is very friendly to beginners. more exercise rep sets. The first choice kits for at-home workouts and traveling2,Resistant Canvas MaterialManufactured from tougher materials, thicker canvas, grip handles, thus making the handy canvas kettlebell sandbag more strong and durable for carrying massive weights. Well-made, fitness-specific, don't leak sand or dust. Note: To prevent sand leakage and keep clean, it is recommended to use garbage bags to fill the sand3,Effective TrainingWhile targeting at your core, due to the shifting weight, the area between your shoulders and knees has to work super hard to stabilise, more complicated moves that enlist the stabilizer muscles into the action and thus leading to more calories burned in less time4,Great Training OfferThe sandbag has not a consistent shape or form, weight constantly shifting around within the bag, this can activate your less commonly used muscles to maintain the stability of the sandbag. Therefore, it makes the workout more challenging by engaging your stabilizer muscles over and over again5,Changeable Sandbag WeightThe kettlebell weight sandbags are adjustable. You can adjust the weight of the sandbag depending on several factors including your ability level, training experience, and purpose. If you are looking for strength training, all you need to do is to make a heavier sandbag and concentrate on low exercise rep sets. If you want to add in conditioning, make a lighter sandbag and add more reps and intensity.