S-Cool Mits are made of neoprene with patches on the palm and basket area being made of a hook material that catches and holds on to the 6 included fabric filled (soft) baseballs. Fits right hand throwers and left hand throwers too. S-Cool Mits are sold in a set of 6 Mits with 6 matching light and safe baseballs included. Sized to fit most elementary age children in kindergarten to 6 grade.