Here is what Faith say..
'This Faith Neptune model is based upon Patrick James Eggle's highly acclaimed 'Saluda' shape.
A Baby-Jumbo size with a 16" lower bout, the Neptune is the perfect model for those seeking acoustic power without the physical bulk of a full-sized Jumbo.
The Spruce top and Mahogany body of each of the Faith Naked instruments is 100% solid tonewood – in keeping with all other Faith series. However, the cosmetics and non-essential dressing has been stripped away, leaving the guitars in their natural, Naked state. Satin finished all over, the tonewood is almost entirely unrestricted in its resonant movement, so the tone delivered is far beyond what is normally expected at this price level.'