Yes, Guardian Caps XT fit the Axiom helmets, Trench helmets, and all other football helmet designs and sizes.  For the Axiom helmet, the Guardian Cap’s two front straps attach through the top of the helmet and the two side straps reach and attach around the top bar of the facemask.  Make sure all snaps are snapped and the Velcro is in place.
Watch our how to attach video here for more details.