The iSub-B is the first Innokin iSub tank powered by advanced Plex3D Coils with 3D mesh which use less power to deliver bigger flavors and clouds. Plex3D Coils advanced coil design with ‘Micro-Grooves’ increases the surface area and produce amazing flavours. Plex3D Coils rapidly heat up and cool-down faster than traditional coils, extending coil life and the organic cotton and wood pulp wicking improves e-liquid coil flow and boosts flavours.