If you carry a flashlight - and lots of people do these days - you want it to be available for instant use, yet not in danger of being lost. Carrying in your pocket is neither secure nor convenient - and can cause your light to be left on without you knowing. Fabric pouches will hold your light, but it takes effort & time to remove your light from them, and both hands to put it away again, which leads to stuffing it in your pocket - or worse, setting it down somewhere!
The V70 holds your light securely, ready to go and visible so you won't leave it on accidentally - and stowing your light is quick & easy with one hand. Incredibly tough, the first one I bought 10 years ago is still functional, even though a broke a piece off the top - and I'm clumsy enough to be hitting it on furniture and other obstacles pretty much daily :)

I ordered a nylon holster for my light and threw this one in just for fun. Since getting them both I have exclusively used this one. It's very easy to get the light in and out of but also very very secure. So far I'm loving this holster and don't plan on switching back to nylon any time soon.