Patagonia Men's Nano Puff Hoody - Conifer GreenNano is short for nanotechnology, which essentially means really miniscule stuff and or the manipulation of individual atoms and molecules, which is way beyond our comprehension. Patagonia have utilised a highly compressible, low bulk and hydrophobic PrimaLoft Gold Insulation Eco though, in order to make the Nano Puff Hoody an extremely lightweight and slim piece, ideal for layering with excellent heat retaining properties. Packs into the internal