Sportneer curved sandbags are designed for ankle exercises, featuring a new curved surface structure that follows the natural contour of the ankle. The ergonomic design ensures comfort and prevents sandbags from piling up and sinking during workouts. The sandbags are made with upgraded fabric, including a double-layer SBR composite fabric for the outer layer and lycra fabric for sand-filling protection. The fillers are tailored for different needs, with soft fillers for lightweight models and high-quality pure iron balls for high-weight models. Sportneer offers five weight options: 0.5 lbs, 1 lb, 2 lbs, 3 lbs, and 5 lbs, all available in pairs. The adjustable wide velcro design provides a secure and comfortable fit, and the sandbags come in various colors for added style. Perfect for a range of exercises, including walking, running, aerobics, dancing, and physical therapy.