Boulder Bags, big enough to carry the whole shop with me...but I rarely wear them.
The cordura nylon has been a Godsend for lots of us, nice wide belt, suspenders.
(BTW, I think it's ridiculous that people still wear little leather "Phoneman" bags..just teasing)
The rest is in a combination of toolboxes, Klein Bags, and a brief case (mostly test equipment, and a fresh new pair of Hanes; a brief case should carry at least 1 pair of "briefs")
Usually have a T-5 Fluke, and a ??-in One Screwdriver in my pocket..makes it hard to drive.