These ankle holsters were designed to conceal small frame/medium frame handguns inside your pant leg. It is made with a soft elastic fabric, a reinforced hook and loop thumb break, and a hook and loop drop down system for your leg. The small frame fits small subcompact pistols including the .380, .22, and similar pistols, while the large frame fits sub-compact pistols including .40, .45, and 9mm pistols.