Durability and Comfort: The ankle weights were made of soft and stretchy mercerized cotton for exercise, and moisture absorbing material inside, breathable and comfortable to wear, lasting durability. No Sand Leakage: Filled with high quality iron sand, the wrist weights add more resistance to your daily workout. Reinforced stitching and sturdy outer trim prevent the iron sand from leaking out while enhancing durability These universal-size hand and ankle weights extend its length to 13.6 inches, with easy to adjust velcro straps to provide a greater fit for ankles and wrists of all sizes Fully Adjustable: Adjustable strap closure for a snug and secure, customized fits ankle/wrist/arm/leg. With long enough velcro strap, the leg weights are super easy to put on and take off Multi Scene Application: The wrist and ankle weights can be used for indoor fitness, yoga, outdoor running, hiking, walking, cycling and other sports. Teenagers and children can be used for gymnastics and dance training