I've had a Blade-Tech ultimate Carry Belt now for a couple years and for durability and performance it's as good as anything out there.
https://blade-tech.com/products/ucb?...=5617200955420
The link I provided shows the nylon version, which is what I have. These belts are easy to use, easy to fit, have an integral reinforced internal polymer core (to prevent sagging), feature 1/4-inch adjustments, and are rated for 1,300-lbs. tensile break strength.
They now have a leather version, but I don't have any first-hand experience with it, though the ratcheting system and the stiff insert are probably identical.
I got the ballistic nylon version because I wanted to use it on fishing and hunting trips, where I knew it'd get wet for weather or sweat. After slogging through streams/marshes/whatever I simply rinse it under a hose and then take the buckle off and toss the belt into the wash and air dry (not sure if it's dryer-safe).
When my current "around town" carry belt kicks the bucket I'll probably buy a leather version of the Blade-Tech.