A holster is a wearable carrier—often considered a part of clothing or gear—designed to hold an object so it can be carried securely and removed quickly. Traditionally the term refers to a case for a handgun such as a pistol, but similar mounts are used for tools, radios and, more recently, mobile phones. Holsters balance retention, accessibility and comfort.

Characteristics and components

Most holsters feature a body or pocket shaped to the item, an attachment to keep the holster on the wearer, and one or more retention features to prevent accidental loss. Fit is critical: a properly sized holster supports the item and aligns it for a smooth draw. Holsters for firearms are typically designed to protect the trigger area and reduce the risk of accidental discharge.

Common styles and carry positions

  • Belt holsters (outside-the-waistband, OWB): attach to a belt and are widely used by police and civilians.
  • Inside-the-waistband (IWB): sit inside the pants for concealment.
  • Shoulder holsters: suspend under the arm on a harness, useful when seated or wearing heavy outerwear.
  • Ankle, pocket and thigh (drop-leg) holsters: specialized positions for concealment or secondary weapons.
  • Device holsters: molded pouches or clips for phones, radios and multitools.

Materials and retention systems

Holsters are made from leather, molded thermoplastics (such as Kydex), nylon, and hybrid combinations. Retention can be passive (tension, friction) or active (thumb breaks, mechanical locks). The choice affects draw speed, durability, and how the holster wears clothing.

History and development

The basic concept—a worn pocket or sheath—has existed wherever people carried tools. In modern form, holsters evolved with sidearms and uniforms, adapting for concealment and safety. By the late 20th century, similar designs were adapted to carry portable electronics, creating a consumer market for device holsters.

Holsters are used by military, law enforcement and civilians for duty, sport, self-defense and everyday carry. Proper holster selection and training reduce accidents and improve readiness. Legal rules about carrying vary widely by jurisdiction, and some communities regulate styles or require specific safety features. For broader context on clothing and carry accessories see clothing.

Distinguishing holsters from sheaths or pouches is useful: sheaths usually enclose bladed tools, while holsters are optimized for rapid, controlled extraction. Choosing a holster means balancing concealment, comfort, retention and the intended use.