The iSub-B is the first Innokin iSub tank to be powered by their advanced Plex 3D coils with 3D mesh, using less power to deliver bigger flavours and clouds. The Plex 3D coils have an advanced coil design with ‘Micro-Grooves’, to increase the surface area and produce amazing flavour. Plex 3D coils rapidly heat up and cool-down faster than traditional coils, meaning better coil life. In addition, the organic cotton and wood pulp wicking improves e-liquid coil flow and boosts flavour.