PROTECTIVE APPAREL AND HELMET

原文（中文）

An item of protective apparel comprising: first and second components () that are configured to move relative to one another; and a sliding interface provided between the first and second components; wherein the sliding interface comprises first and second surfaces () that oppose one another and are configured to slide relative to each other; the first surface has at least a first region () which is divided into at least first and second areas () that are configured such that at least one of the static coefficient of friction and the dynamic coefficient of friction for the first area against the second surface is different from the second area against the second surface; the first surface has a second region configured such that the static and/or dynamic coefficient of friction of the first surface against the second surface is different in the first region from the second region (); the second region is divided into at least first and second areas () that are configured such that at least one of the static coefficient of friction and the dynamic coefficient of friction for the first area against the second surface is different from the second area against the second surface; and the arrangement of the first and second areas in the first region is different from the arrangement of the first and second areas in the second region.