Uniform size with varying weights to enhance endurance – By increasing resistance during training, it enhances strength, pushes limits, promotes cardiovascular health, and improves endurance, thereby extending training time and increasing training efficiency. Versatile – Ideal for running, hiking, bodyweight training, and CrossFit. Even weight distribution – Made with iron shot, it evenly distributes weight to maximize training efficiency and minimize the risk of injury. Dual adjustable elastic straps – Two adjustable straps allow for personalized adjustments to suit any body type. Reflective strips – Reflective strips at the front and back enhance visibility in low-light conditions. Weight: 6.2 lbs.