But the pricetag seems quite high at around $50. You'd need at least 2 to and have to wash them almost daily, and probably more like 3+ for a rotation in your wardrobe. I would also expect that daily wear would wear these out and require pretty regular replacement of the shirt and/or elastic with nearly daily washings.
If I were wearing one on a daily basis, youre right, you would be better off with a couple. The 5.11 would need washed daily, the Kramer, you could probably get by with once a week or maybe more, depending on time of year and how you sweat, since its not the actual undershirt. Thats assuming youre wearing a tee shirt too, if not, which I wouldnt personally like, it would likely have to be washed daily too.
My Confidant has been washed a number of times, and doesnt seem to have been degraded because of it.
As far as the price, a couple would set you back about the same as a good leather holster, and about half of a decent shoulder holster.
Ive worn shoulder holsters, and Im not real fond of them. Ive always found they are one of the easiest to spot, tend to be uncomfortable over time, and wont allow you to remove the cover garment.
The only one Ive found to work OK, and on occasion still do use, is the Galco "Executive". Its a very minimal holster, that is comfortable, but you still have to be careful about it being seen.
The big advantage to the undershirt type over a traditional shoulder holster, is they dont print, have straps that tend to expose themselves, and the gun doesnt swing out (you also dont have near the "bulge") if the holster itself isnt secured, and you dont need a coat, or can remove it, if you are wearing one.
Ive used a number of ankle holsters, and have found the Desantis to be the most comfortable for me, especially their "Leather Ankle Holster" model. So far, its the only ankle holster I can wear all day (16-18 hours), in total comfort, and carrying something like a Glock 26 or J frame.
Contrary to what you often hear, ankle holsters arent all that hard to access quickly, if you practice, and it can be done in a couple of different ways.
The downside to them is, they are basically in the dirt, and the gun and holster tend to get dirty quickly, especially if you work outside of an office environment. Water is another worry there in that respect too. When in company of others, you need to watch how you sit, and place your legs, and getting out of some vehicles, can be problematical too. Climbing, lifting your leg, etc, can be an issue as well. Running isnt a lot of fun either, and has its own issues.
As far as anything "off body", I say pass. If its not on you, you dont have it. Its also something that often tends to be the target of theft, simply for what it looks like or is pretending to be.
As I said earlier, my favorite these days, for anything deep concealment wise, is the Smart Carry holster. Ive yet to find anything that works as well at what it does, and in as many situations. It will conceal fairly large gun (the developer wears a GM 1911 in a pair of jeans with his) with no problem. Its quickly and easily accessed, even one handed, and its also very comfortable, even when youre active and over extended periods of time. Its waterproof on the back side, so rust normally isnt an issue. The only cover garment you need, is a pair of pants or shorts. Its also the only holster Ive ever used, where the gun stays "clean", even over extended use in a very dirty/dusty environments.