The edition of 66 Artist's Proofs was comprised of a variety of six transitional colours. The colourways within the edition of 66 consist of: Dark Orange to Light Orange Rain, Green to Purple Rain, Green Rain, Pink to Yellow Rain, Green to Burgundy Rain and Green to Blue Rain. There are therefore thought to be approximately only 11 impressions in each colourway. An impression of Dark Orange to Light Orange Rain has never before appeared at auction.

The title 'NOLA' is an abbreviation for New Orleans, Louisiana (LA), the city where Banksy's first version of this subject appeared as a stenciled graffiti work in 2008. The image of a girl being drenched by rain that is falling from inside of her umbrella is in reference to the devastating events of Hurricane Katrina in 2005, which had been amplified by failure of the flood defences that had been designed to protect the citizens from such a disaster.

The published editions of NOLA were: White Rain (edition of 289); Grey Rain (edition of 63); Orange Rain (edition of 32); and Green Rain (edition of 31).