Hilleberg has had a waterproof/breathable Bivanorak (combination bivy and anorak) in their line for years. Intriguing multi-use concept, but heavy by ultralight standards. (See our review here.) Starting in 2006, Hilleberg will also offer the Bivanorak in a water resistant and breathable material that brings the weight of the garment/shelter squarely into the ultralight range – 11.3 ounces.
The Bivanorak looks like an anorak on the top – sleeves with drawcord adjustments, hood, zip front with windguard – and extends to below the feet with a drawcord closure so that it can be used as a survival shelter or a sleeping bag cover. The bottom can be drawn up, as in the top photo, and worn as a cagoule. The fabric is wind and water resistant, but not waterproof.
Bo Hilleberg wearing the Bivanorak fully extended.