https://www.youtube.com/watch?v=jxqladd5aRc Train anywhere, increase your muscle mass, improve your strength, and tone your legs and glutes with our No Rules ankle weights. They feature a double strap for a snug fit. The weight is distributed across both feet. Filled with iron and sand: 2kg : 100% sand Each one Product height : 13 cm Product length : 5 cm Product width : 35 cm 4kg : 80% sand, 20% iron Each one Product height : 15 cm Product length : 5.5 cm Product width : 44 cm 6kg : 50% sand, 50% iron Each one Product height : 15 cm Product length : 5.5 cm Product width : 44 cm 8kg : 80% iron, 20% sand Each one Product height : 15 cm Product length : 5 cm Product width : 44 cm 10kg ; 100% iron. Each one Product height : 17.5 cm Product length : 5.5 cm Product width : 44 cm