If you are looking for a portable dry herb vaporizer that gets the job done, Yocan Evolve D is absolutely for you. This vape pen utilizes a unique coil technology called Dual Pancake Coil. It was designed to ensure an efficient yet even distribution of heat. With this kind of coil, you are certain to achieve only the best vapor flavor. With its very stealthy design, this vaporizer surprisingly comes with a spacious chamber that allows you to enjoy a prolonged vaporization session without having to frequently reload.