The Herakles Plus is the latest version of one of the best Sub Ohm tanks on the market. Sense wanted to improve on an already innovative tank by simplifying its use but keeping the same amazing cloud and flavor production we have come to expect from the Herakles line of products. This new version features top fill technology and additional air control features. The new air flow and top fill technology fixes some of the issues other top fill based tanks have experienced in dulling the flavor because of how the chamber processes the air. Herakles has innovated the way the flow of air works its way through the chamber so that instead of becoming part of the vapor in a secondary process it hits the coil while the vapor is created. This new tank is definitely a vast improvement for flavor that we've wanted and requested.