Why Dogs Love It The Mighty® Microfiber Ball Elf features a soft microfiber exterior with up to two internal layers of material, up to four rows of reinforced stitching, and flexible seam protection for added durability. Rated DuraScale™ 9, this toy includes six squeaker balls in place of traditional stuffing, helping minimize mess while delivering long-lasting interactive fun. It floats for water play and is machine washable (air dry) for easy care.