As this engineering prototype shows, our shield is secured with a tape of loop over the crown of the head.
To Fasten pull the tapes of hook from the brow but stagger the ends so the hook is accessible. Fasten both with the crown loop tape
To make sure everything stays in place, apply the small extra piece of loop tape over the two brow tapes and the crown tape. Once done the whole shield can be taken off, without unfastening the Velcro hook and loop.