ADJUSTABLE LEG WEIGHTS: The sandbags for ankle weights are removable. Each single weight comes with 5 removable sandbags which weighs 1 LB. Each single weight can be adjusted from 1 to 5 lbs and one pair weights can be adjusted from 2 to 10 lbs by adding or reducing the sandbags QUALITY & COMFORT: The Sportneer ankle weights were made of neoprene exterior, reinforced stitching, sturdy outer trim and moisture absorbing material inside, soft, breathable and comfortable, you could feel its softness when hold in your hands STURDY METAL LOOP: The specially-designed D-ring withstands pulling and holds the strap in place and prevent the ankle weights from slipping down easily, no matter how much you move ONE SIZE FITS MOST ANKLES: The ankle weights feature long velcro straps(about 12.5inch), ensuring a comfortable and secure fit for size of ankle from 7.5 to 12.5 inches(perimeter) ADD WORKOUT INTENSITY: Add more resistance to daily workout, walking, jogging, core training, fitness, aerobics, gym and many other exercises, helping increase strength, rehabilitate muscles, improve balance, and assist physical therapy.