My take on the Combine soldiers' standard helmet from Half-Life: Alyx, designed specifically for my cosplay. I am a 3D modelling novice so it ain't perfect, but it is completely 3D printable and wearable. Please credit if you use it in your costume.
UPDATE: For some reason Fusion exported the OBJ files in a compressed and ugly low-poly version? I've re-uploaded much nicer STL files.
IMPORTANT: This is a tight-fitting helmet. My head is 23" (58cm) around at its widest. If your head is larger you will need to scale it up.
Readme PDF for printing tips and assembly coming soon. But for now, small wood screws (~10mm length, ~2mm diameter), 1/4" wooden dowel and 3x8mm magnets are required for assembly. You can also glue in 9mm sewing snaps to attach the magnetically separating "breather" component to a balaclava or other face covering.