for concealed carry backup guns.The primary characteristic that often distinguishes duty holsters from all other holster designs is retention. Modern law enforcement duty holsters are available with varying levels of retention security (i.e. Level I, Level II, Level II+, Level III, etc). Some security features are passive (such as retention screws, decoy straps, or hood guards), while others are active and require deliberate manipulation by the officer during the draw (such as traditional thumbreak snaps). While a higher level of retention will make it more difficult for a suspect to take a holstered handgun from an officer, it may also reduce the speed and ease with which an officer may draw his handgun (especially if the security features are active and not passive). Therefore, when selecting a duty holster, an officer may be forced to find a compromise of speed and retention that he/she is comfortable with. Tactical/military holsters are usually made of nylon or plastic. They may be made in a camouflage pattern to match the wearer's uniform. They are often of a drop-leg design and offer a retention device. Some military holsters still use the old flap design (also referred to as a "suicide" or "widow maker" holster, which is cumbersome and slow on the draw, but provides greater protection for the holstered firearm against the elements). There is some overlap between duty holsters, tactical holsters, and military holsters. Weapon retention is generally not as important a consideration in military use as it is in law enforcement due to the differences in their work environments. Concealment holsters are designed to be easily concealed, as well as lightweight and unobtrusive. They are generally designed for subcompact and compact handguns since they are easier to conceal. Concealment holsters are designed to be worn under clothing, such as on the belt under a coat, under pants in an ankle holster, or in a trouser pocket. Since the holster is held close to the body, comfort is important, and concealment holsters often have broad surfaces in contact with the user's body, to distribute the pressure across a wider area and prevent abrasion of the skin. Protecting the handgun from the user's perspiration is often an important consideration in such carry locations. Often the outside of the holster is broader, to help break up the outline of the handgun and prevent printing, where the outline of the gun can be seen through clothing.