I've been using this for a few days now. I am so impressed with this product I couldn't wait to write a review. I used to carry with a clip on holster but I always feel like my pants are going to fall down. Some places I need to conceal a little better, but want access to my gun. I got this to conceal while having convienient access to it. It is super comfortable and lightweight. I sit at a desk all day wearing it and almost forgot I had it on. I carry a small caliber gun (.380) it fits perfect, while drawing the gun is a little awkward, it can work.

I'm able to bend down, sit down, get in and out if my car, etc without it being uncomfortable or moving around.

The only bad part is the velcro piece it could get a little itchy but if you make sure it's lined up correctly it shouldn't be an issue.

It has a pocket in the front for spare cash or cards and a spare magazine pocket inside the larger one.

I typically wear men's medium t-shirts as I am a bit heavier around my stomach so I ordered a large and it fit fine. It's pretty true to size.

It conceals really well and you can't even tell that you're carrying. I'm really impressed with this! Highly recommend it especially if you need to conceal but want your gun easily accessible.

I have struggled to find a comfortable and secure IWB holster for my handguns and wasted lots of money purchasing holsters, trying them, and discovering that they were not comfortable, didn't fit well, or didn't hold my weapons securely. I managed to find a good ankle holster for my backup gun, but was looking for a good, sturdy holster for my Springfield XDs .45 ACP that I carry regularly. I looked at several belly bands, but they were either far too pricey or too flimsy looking until I discovered the UnderTech belly band. I've been wearing it for weeks not with no major issues. I find that if I wear it too low, the band tends to fold over around my abdomen, but as long as I keep it about waist height, it stays in place nicely and allows me to choose several gun positions. Most comfortable for me is SOB, but I have also tried appendix and cross draw positions successfully. This band has a slot for a semiautomatic and one for a revolver. I only us the slot for semiautomatic, but if I ever purchase a revolver it's nice to know I'll already have the holster for it. I have four other weapons that I have wanted to carry which are too large or too bulky for the IWB holsters I've purchased for them. Because of the universal design of the pistol pocket on this belly band, I can carry any of my guns with no problem. It's nice to be able to use only one holster now for all five handguns. I recently purchased another UnderTech in a smaller size as the one I wear has stretched enough that I have to overlap the hook & loop portion. I figure the smaller one with stretch just enough to be comfortable and secure.

I've been using this for over a week now and it is definitely my favorite holster I've used so far. I carry a glock 23 around which is a larger double stack carry and this works well with it. Although I do sometimes feel like the gun is a little unsecured when I bend over a lot, I've have yet to have any problems with it, and it is probably me just getting used to it. I do like that the band has additional pockets for a spare magazine or money, although I have yet to use it.

I used to carry my glock in a leather belt click holster and this feels much better than that. I can wear this under my pants or shorts which means my gun won't shift around if my pants move up and down a little. The band also keeps the gun closer to your body when you sit down as apposed to my typical holster which would make the butt of the gun stick out when I sat down.

One of the downsides is that it does get a little uncomfortable after long periods of time. Maybe a larger size would be better for me, but I am a size 38 waist so I bought a large which is up to size 40 waist and it seems a little tight. You might want to think about going a size larger, but I would be worried about getting one that is too loose because then the gun wouldn't be as snug.

Overall I like this product very much and it will probably be my go to holster, although I will always keep around my leather belt and serpa holster. This product was recommend by a friend and he stated that he has used his for many years without any issues.

Extremely surprised at how much I liked this and ended up returning a holster nearly 5 times the cost of this in favor of this product. It's not without it's flaws though, namely the positioning of the mag pouch. Carrying at 3 or 9:00 the mag pouch is sitting directly on your spine. In the appendix position, the mag pouch is on your hip on the wrong side. There's enough real estate on this band for options so I'm not sure why they couldn't have put pouches on the weak hand side. I carry at 9:00 so storage/mag pouches from 1 to 2:00 would be great. Frankly, they should consider selling a version without the cross draw revolver holster and use that space for a long pouch with a mag pouch or two on the inside.

I appreciate that the main holster is slightly canted forward although I'd prefer maybe another degree or two of cant to help with concealment of longer grips. I might modify mine, but unless I custom make my next one, I'd definitely buy this product again. I wanted to give this product 4 stars due to the gripes listed above, but it makes carrying (even a huge G21) so comfortable and enjoyable, I'd feel wrong giving it less than 5 stars.

So I'm reviewing this only because of the size chart. The belly band it self seems to be great quality as far as spandex and velcro are concerned. The Undertech belly band here is not sold directly through the Glock store, but by another web seller, which has different size chart specifications than GS. Next time I will order through the Glock store directly. I have this problem with clothing real often, I'm not a big guy at 5'8, 160 lbs, with a 30 in waist and a 43 inch chest, I'm kind of in between sizes so I ordered the medium just to be safe, but should of ordered the small. The belly band has to be tight if you are wearing it higher than your waist like I want to, right under the pecks with the gun under the arm. Good product just returned for the next size.