Material: Pertex Quantum shell, 800 fill power down
Weight: 37oz (+3.5oz if using included dry-bag stuff sack)
Features: Draft collar and hood draw cords, trapezoidal baffles, small pocket near head, YKK zippers
Temperature rating: Comfort = -5c, Limit = -12c, Extreme = -31c
I’m not sure why this piece of gear escaped review for so long seeing as I use sleeping bags frequently. If you have followed this blog at all, you may have noticed that I have reviewed multiple pieces of gear from UK manufacturer Rab. As I’ve mentioned before, they make great products at reasonable prices.
Before discussing the design features of the Neutrino 600, lets discuss the temperature rating system Rab uses for their sleeping bags. Without getting into too much detail, this system is called EN 13537 (Wiki article), and it breaks each bag down by providing 4 different temperature ratings – Upper Limit, Comfort, Lower Limit, and Extreme. The Comfort rating is going to be the most useful number for anyone planning on using their sleeping bag for a normal night of sleep. When you get into the Lower Limit and Extreme ratings, there are certain assumptions about sleep position, duration of sleep, and possibility of cold-weather injury (all things most of us do need want to concern ourselves with). I’ll get back to temp ratings and my personal experience after discussing some of the design features.
Right out of the box, this sleeping bag seemed well designed. The Neutrino 600 lofted up very nicely within a short amount of time, looking almost exactly like the picture on Rab’s website. The baffles function well so far, keeping the down evenly distributed and where it belongs. There is a nice little pocket near the hood for your lip balm or car keys or whatever small item you care to store there. The draft collar is large enough to actually be functional, especially when you cinch it down with the elastic drawcord. The hood also has an elastic drawcord to keep it close to your head. There is a small velcro tab to keep the bag from unzipping during sleep. Small nylon tabs on the foot of this bag make hanging it up in your closet easier (storing you sleeping bag UNCOMPRESSED is vital for proper loft and product function).
My field test of the Neutrino 600 was a 5 day 4 night fall (or was it winter) backpacking trip in the Indian Peaks Wilderness in Northern Colorado. Temperature ranged from 60F during the day to low teens at night. Elevations ranged from approximately 9500ft to 12000ft+. In addition to the Neutrino 600, I used a Silk, mummy-style sleeping bag liner and wore at a minimum, socks, pants, base layer top, and fleece top during sleep.
Staying warm during some nasty weather at Lost Tribe Lakes
Considering the fact that temperatures were slightly below the comfort rating every night, I was pleased with the warmth of the Neutrino. It should be noted that I was using a 4-season tent which completely cut all wind and insulated a small amount. I was able to sleep comfortably (although I did wake regularly – more a personal condition regardless of warmth). Since I was using this bag closer to the lower limit rating, I opted to put a synthetic jacket over the foot of the bag (which came up to my knees) as well as drape my down jacket over my chest on 2 of the 4 nights. The Neutrino didn’t feel too confined but did feel snug, especially around the feet. The draft collar and hood functioned well without covering my mouth and nose or restricting my breathing and also sealing in a good amount of heat. Condensation formed every night near my mouth where my breath contacted the outside of the sleeping bag – something I have experienced with ALL sleeping bags in colder temperatures. Even with the below freezing temperatures at night, the Neutrino did absorb a bit of moisture. This was remedied with a warming fire and sun exposure when the opportunity existed.
Overall I was happy with the Neutrino 600’s performance. Rab’s temperature ratings seem to be fairly accurate for me. The design features of this sleeping bag are functional and useful. Some more water resistance in the shell material would be nice considering this is a down bag. I feel this sleeping bag is above average in my overall experience and I would definitely recommend it. If there are any design features I have not addressed or questions you have, please leave a comment and I will be happy to respond!