I have worn this holster 3 to 4 times a week for aprox. 12 hrs a day. I had only 1 incident where the thumb snap came open when I was walking in heavy brush, but the pistol remained in the holster. I would recomend that if you use this holster and work in a wooded area that you find another location and holster to carry your pistol in.
Pros: Comfortable when worn over a boot.
Cons: Some discomfort when worn directly on ankle.
This review was written in the old system and had content requirements that are different than reviews written today.