The Regulator vest is made of premium 1.4mm leather. The updated D3O Viper back protector is removable, doing so reveals a large back panel perfect access for attaching a club patch, or whatever you can think up. Also featured are two cross draw pistol pockets up front for easy access. The Regulator Vest is sized to fit over your jacket, or just use the side fit adjustment straps to wear it alone. Constructed of 1.