Comfort
The Nilas Jacket is a well-constructed and nicely-fitting down jacket—no doubt about that. I didn’t find it quite as warm around camp as one may expect, particularly as the expedition progressed. However, it was still quite warm enough for my needs on an 8000m peak as the capstone of a modern layering system.
Warmth/weight performance
This isn’t the warmest jacket out there, but at half the weight of a North Face Himalayan Parka or Mountain Hardwear Absolute Zero Parka, it packs quite a punch. I used the Nilas as part of a versatile layering system and was blown away by the protection it offered given its packability.
Design/features
Some good, some bad here. I loved the butter jersey cuffs. They are soft and comfortable—a huge upgrade from Velcro. Also, I’ll give a big thumbs up to the large mesh interior pockets for water, food or that spare headlamp. I found the location of some of the insulation to be a bit strange—for example, it almost seemed like the sleeves are warmer than the back. The zippers lack pulls, which means that you can’t adjust the jacket with bulky gloves or mittens on (you can obviously build your own out of thin chord, or buy after-market ones—just don’t forget this in the midst of packing for your trip).
Weatherproofness
The face fabric offered a great deal of protection from wind and spindrift without feeling too “crinkly.” The jacket did develop a couple spots that got cut or started to leak down by the end of my Lhotse expedition. Unlike the Nilas Bib, I did find that the baffles in the torso, particularly in the back, were somewhat too large or misplaced so that I developed colder spots.
Insulation
The Q-shield down is impressive and it is true to its 850-fill rating. But after an expedition of abuse and certainly after washing the garment, the down became poorly distributed, particularly with the large baffles in the back.
Value
The price tag of $550 makes this a fairly expensive jacket, although it is a bit cheaper than competing (and heavier) items from The North Face, Mountain Hardwear, etc. That said, it may be a bit expensive for what it offers in terms of warmth, and there may be better values to be found in the First Ascent Peak XV parka or the tried and true Patagonia DAS Parka.