The Kangaroo is certainly not a fast draw holster but it works very well as a concealment holster while wearing just a shirt, tucked or not tucked. I wear a t shirt or wife beater under my shirt when wearing it just because I find it more comfortabe. Snaps on a western style shirt make the pistol a little easier to access or leaving the top couple buttons unbuttoned on a regular shirt helps also (and looks macho?). I've heard of people sewing buttons on the outside of their shirts to make it look buttoned while leaving a space to reach inside for a faster draw. I haven't done that though.
