What are the differences between a drop leg holster and a holster

Leg Holster

Since police holsters have multiple levels of retention are there

Universal Drop Leg Pistol Holster RMR Cut Out – Wilde Custom Gear, Tactical Nylon

GLOCK OWB DROP LEG KYDEX HOLSTER

What is the best, most economical hip or shoulder holster to use

Why don't cops wear shoulder holsters anymore? - Quora

Why a Universal Drop Leg Holster is a Must-Have

What's a good belt holster for a government sized 1911 by bianchi

DROP LEG HOLSTER

StealthGearUSA® Ventcore 1.0 Drop-Leg Holster - StealthGearUSA

Cobra Dropleg Holster w/tactical lights and lasers

Nylon Drop Leg Holster

In regards to open carry, is there a downside to drop leg holsters