The current Esprit Aura range is closely derived from the 2010 Lumina vintage from which it also uses 90% of the technology. Structurally we are dealing with specifications close to those of Eterna which speaks for itself! On the other hand Aura adopts a series of 1060 pure copper strands with long crystals which represents an increase in electrical flow of 40%. The overall diameter is much larger but the flexibility of the cord remains essential.