A "Belly Band" holster is usually a large piece of elastic, sort of like an Ace bandage you'd use on your sprained ankle or a blood pressure cuff. They have a velcro closure and holster/pockets sewn into the elastic band. They're generally worn around the waist.

A shoulder holster can be made of any of the common holster materials such as leather or nylon. It hangs suspended from the shoulder by a strap, and has a suspension system that goes across to the opposite shoulder to help hold things in place, and distribute the weight.

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John 3:16 .