Weighted vests have become popular tools to help lose weight, build endurance, gain muscle strength and improve cardiovascular conditioning more efficiently. Designed for optimum comfort, the Pure Fitness 40 lb. Weighted Vest is perfect for adding resistance to your workout, whether it be for aerobics, sports conditioning, or training for military, fire-rescue or law enforcement. Our comfortably padded weighted vest features 43 sand-filled weights (.88-Pound/.4 kg each) that are easy to insert or remove and conform to your body contours. This vest is designed with a fully adjustable closures to fit most adults and features reflective trim for safer running or jogging at night.