If you carry all the time and sweat, the Blade Techs are the way to go.
If it absolutely has to be leather, skip the rough out type holsters. They suck up sweat like a sponge.
At the time this pic was taken, the holster on the right was just over ten years old (the one on the left was a new "spare" that was never needed) and saw daily use. In all that time, a small piece of the sweat guard broke off and I replaced the straps a couple of times.
I pretty much quit using leather holsters 15+ years ago once I got that first Blade Tech. Leather just dont make it if you have the gun on all day long, and especially in the summer. I no longer carry that Commander and have since moved on to SIG, which also usually rides in a BT IWB. I have been using a Milt Sparks VMII too off and on the last year or so, mostly in the winter, and its a good holster, but I dont think its as concealble as the BT's though, due to the strap placement. Once it warms up it goes back into the holster box.
I figure I saved at least $1-200 a year on holsters when I bought that BT.( I was going through 1-2 good leather holsters a year up til then) I think I paid about $45 for that first BT holster, which works out to $4.50 a year. No more rusty guns either.
Screw leather!