US Patent 7752683 Helmet jacket

A helmet jacket for covering and protecting a helmet and for substantially and releasably enclosing the volume inside the helmet to allow the covered helmet to function as a sealed carrying and storage container. The jacket may include elastic segments that define respective constricted openings through which the chin straps of the helmet extend on opposed sides of a releasable fastening element so that the chin straps may be used to carry the helmet while the fastened jacket material substantially encloses the volume inside the helmet to define a storage volume within the helmet.