Icon Regulator D3O Motorcycle VestA PROFOUND PRODUCTS THAT CREATES ITS OWN DIMENSION. ICON has a unique vision to recognize holes in the market where a product should exist, but doesnt. Its part of the reason we are here. The Regulator Vest is one of those profound products that creates its own dimension. At first glance, its apparent that this is no mere Fat Brother Bobs Cruiser vest. The Regulator is made of premium 1. 4mm leather. The updated D3O Viper back protector is removable;