Steel core with neoprene surface, does not contain toxic additives (non-slip, floor protection and easy to tighten)

Attractive - intense colors act on them actively, whether in the gym or at home you can use the shoulder mouse gymnastics, refresh the lines to eliminate fat, arms and shiny muscles

Fits well in your hand - Hexagonal shape that is not bulky. Advantages, suitable for professional use in the gym or at home