You may want to take your weapon with you while you hike. Sometimes a waistband holster just doesn't cut it. You may want to carry extra items like spare mags, a flashlight or tactical knife.
Normally worn by military or outdoor types, the drop leg holster is great for lots of movement, and little person interaction.
Drop leg holsters are primarily a military item that were designed for the battlefield. The point is to disperse your necessary equipment over a larger part of your body, making it easier to carry.
Additionally, a drop leg holster makes it much easier to draw your firearm.It also comes into its own when you're wearing a rappelling harness.
There is no point in extending your draw stroke and adding unnecessary weight to your legs (when your hips are better at carrying it) unless you're going to gain something from it. This style of holster definitely has distinct advantages, but they will only be realized when used in the right circumstances.

Description:

•         Used to hold handgun, pistol & revolver
•         Can be attached in the wrist belt and fasten to the leg
•         Fully adjustable wrap-around design for additional fit and security
•         Adjustable non-slip leg straps minimize movement and provide maximum comfort
•         Quick release buckle and Velcro strap make this holster fully adjustable
•         Ideal for military, law enforcement, hunters, home /self defense and more
•         Adjustable size: Perimeter 38cm