PREMIUM MATERIALS & HIGH QUALITY: Our training bag is crafted with1050D military grade coated nylon that is extremely anti-tearing, holding up to sweat and dirt, extreme tactical training, and intense workouts. Our sewing thread uses the strongest nylon material which is always used for leather shoes sewing. | NEVER LEAK: Each training bag sandbag has a built-in filler bag which is made of 1050D ballistic nylon. In addition, #10 heavy duty YKK zipper, hook-and-loop closure on the outer shell, heavy duty Velcro on the filler bag, and triple stitched seam to engineer a quintuple leaking proof system, ensuring that the filler material stays fully contained as you workout | FULL BODY TRAINING: Fitting workouts into your busy schedule with ease, sandbag training provides a full body workout, which is the best tool to engage your entire body in training. It is ideal for strengthening and training various muscles through a wide variety of exercises such as lunges, deadlifts, squats, presses, and throws. They work out your entire body and greatly reduce the amount of time you need to exercise | SOPHISTICATED & ULTIMATE TRAINING TOOL: It is a full body workout tool that is a perfect alternative to traditional weights, trusted by military personnel, athletes, and strongmen. The training bag comes with multiple sizes. With each size, you can choose to add or reduce the volume of sand in the bag. The training sandbag is portable and can be emptied and filled. It can be used anywhere you like, such as beaches, forests, trails, and camping activities. | USA BASED, TRUSTED SOURCE: AceFit engages in providing top-tier, Innovative, and high quality outdoor & home training gear. We are USA based and have great dedicated customer service. Full refund is guaranteed if our product doesn’t meet your expectations