Having signed the Official Secrets Act, I'm not allowed to talk about it. But I will say the DJ had to be made to measure, so my Walther PPK automatic wouldn't form an unsightly bulge.
Seriously though, I do wear one when celebrating notable birthdays and dining in good restaurants, where wearing a DJ is not out of place. I used to attend musical soirées in London, again where wearing a DJ was expected.
Actually I have two DJs: a lightweight one for Summer, and a second made from heavier material for the colder months.

