The AlphaHolster belly holster discreetly and securely holds your concealed hand gun close to the body under the clothes. When worn under a golf shirt or t-shirt it"s hard to tell you are even caring, even when you ware your shirt tucked in. The AlphaHolster is made from patented ventilated elastic and secures in the front with Velcro. Your small to medium sized firearm fits snugly and securely into the pocket and there it a strap that fastens over the back of the gun. There are two additional holsters for extra clips. This product is very lightweight, breathable, simple and secure. Made in USA. Size Guide For correct size measure around the abdomen Small 28"-34" Medium 34"-40" Large 40"-46" X-Large 46"-52"