I still have a brand new nav bag in my wardrobe. I had replaced the old one, because with almost twenty years of use, it had big holes in the bottom corners.
However not long after, I decided with three months to go signing up to another seventeen years as “Spec Aircrew”, that I’d really had enough of being a pawn in aspirational Chiefs of the Air Staff’s careers, so I gave up and took my 38 point option to become a civvie.
Never got to use the nav bag and stores wouldn’t take it back.