The "Spec" case is designed for the Thor size S helmet and the Ops Core form factor helmet. It covers the entire area of the helmet, with convenient Velcro panels on all sides for installing patches, insignia, light storage tags, IR beacons, etc.

To install the helmet cover, remove the side rails from the helmet, and if necessary, make holes yourself to fit the features of your helmet. After installing the cover, the rails are mounted in their places and screwed through special holes in the cover. Thanks to this arrangement, the case covers all parts of the helmet and is securely fixed on it.