US Patent 11446537 Kettlebell-type device

Disclosed is a kettlebell type apparatus for gymnastics including: a substantially spherical shaped body formed by a single flexible layer made of polymer material which defines an inner cavity: and a rigid handle fixed to the upper part of the body. The cavity is filled with a filling material that includes at least one liquid, where the filling material occupies from 10% to 80% of the volume of the cavity, and in which the body includes at least one sealable mouth for introducing the filling material into the cavity.