For hunting and/or hiking? You may have a rifle slung over strong side
shoulder? If so, I suggest looking for a holster you can wear cross-draw.
Open tops are great for carrying OWB concealed by shirt or jacket,
but for OWB open carry, especially in the woods, I prefer a retention
strap.
The so called "field style" holsters were made for OWB carry and being
vertical, they work well for cross-draw too.
There are usually a lot of choices on ebay. Here are a couple of mine.
On the left a Hunter model 1100.
On the right an S&W "Wessonhide" model 19.