The Halo was designed with input from Greg Duley (NZ Hunter Adventures) to be a lightweight, compact down bag that is capable of being warm above the snow-line in the Southern Alps. It is lightweight (standard size only 1kg), is just 6 litres when in its stuff sac and has an impressive comfort rating of -10°C.
The Halo has been constructed with the latest cutting-edge Nikwax 800 loft-power Hydrophobic down, which will retain loft throughout the night, despite body vapour moving through the down. The Nikwax waterproof-coated down also repels water should the bag get wet.
It is possible to boost performance beyond the -10 rating if you sleep in a Down or Primaloft jacket inside the Halo.