TRAINING ESSENTIAL: Sandbag is one of the best training tools to enhance strength and endurance. Squat and press to lift weights, or perform aerobic/endurance exercises, could effectively improve the physical fitness of the trainer..DURABLE DESIGN: Our bags are made of durable 1200D Oxford fabric. Both the outer shell bag and the filling bag adopt the double weaving technique. This way you can lift, throw and slam the sandbag to withstand any weightlifting or fitness regimen, and the sandbag will never be torn..ERGONOMIC HANDLE: Six handles can perform multiple hand positions and exercises. These strategically placed handles will provide unlimited exercise possibilities..FOR ALL FITNESS LEVELS: The product includes a main bag and four filler bags. Each small sandbag can hold 8 pounds or 3.6KG of sand. Every level of athlete – new or elite – could adjust the weight of the sandbag to match their training needs..DETAILED DESIGN: Each filling bag uses powerful velcro, which can fix sand well and prevent sand leakage. Even if the sandbag is not full, you can tighten the two tightening webbing to prevent shaking during fitness. Note: No sand contains.