Carrying it horizontally prevents the magazine from rubbing against your skin and you hardly notice it's there when you wear it.It works for both single or double mags.
A strong hook and loop is added to help hold the magazine in place.
You can even sew a few stitches in the middle to fit more stuff like small flashlight, small spray,asthma pump or similar sized items.
It fits most 1 1/2" or 1 3/4" belts.
It's a cool solution for conceal-ability and comfort.