many police departments in the United States have disallowed any equipment from being worn in this position. Groin holsters place the handgun mostly below the waistline in front of the body. There are few body movement or clothing restrictions with this holster type. Thigh holsters (also named as tactical or drop leg holsters) are a popular law enforcement and police item that stores the sidearm on the leg where the hand naturally hangs, making for a fast draw. Early U.S. cavalry units used these in the early 1900s with a leather thong strapping it to the leg. Modern ones often use a drop leg PALS grid with a modular holster attached, often with buckles for quick release. Law enforcement and military personnel wear these when a bulky vest or a full belt (as in the case of K9 officers) makes belt carry unhelpful or when they want an alternative to another holster. Western style holsters of this type, known as buscadero holsters, were worn by many actors in Western films and TV shows set in the 1800s, even though they weren't invented until the 1920s. Ankle (aka "boot") holsters offer excellent concealment and are used by law enforcement officials who wish to carry a secondary weapon to back up their primary firearm. However, many officers find that even a small handgun bounces around too much while running or during other physical activities. Chest holsters can be attached to MOLLE-compatible vests and chest carriers. Like shoulder holsters, chest holsters are often easier to draw from than belt holsters when the operator is seated inside a vehicle. Strut holsters are used exclusively for concealed carry. They are worn above the trouser belt line as a cross draw holster located directly under one's arm (9 o'clock position) or toward the front of the body (10 to 11 o'clock position). The design contains a strut which is shaped to nest behind one's trouser belt and attach to the holster at the other end. The strut transfers the weight of the firearm to the belt and retains the weapon in place for secure removal. A flexible band is also attached to the holster and worn above the waist to keep the weapon snug against the body. Concealment is achieved by wearing the unit inside of a shirt which may be tucked in or worn outside. Pancake holsters are typically made of two pieces of the