AEROMAT Versatile Textured Surface Petite Weighted Ball This is a versatile exercise weight ball with a textured surface providing enhanced grip. The ball has a diameter of 3.5" so it fits comfortably in the palm. It is made with natural rubber and filled with iron sand. This weighted ball is ideal for intense Yoga or Pilates practice and more toning exercises. Note: The ball is NOT designed for bouncing. AeroMat is one of the leading lifestyle brands in fitness products and accessories, with a mission of making fitness and well-being accessible to all. The products are crafted with durable natural materials with a fine attention to detail.