The Evolve D Plus is the newest dry herb pen from Yocan. It builds on the success of the Evolve D and brings some useful new features. It is powered by the 1100mAh Evolve Plus battery which almost doubles the battery capacity of the Evolve D. It has a new dual coil that has 12 wraps of wire to allow for better heating and stronger vapor production. The dry herb chamber really sets it apart with its huge capacity. It also has the convenient stainless storage container in the base of the battery.