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Reviews > Sleep Gear > Sleeping Bags > Sierra Designs Nahche and Winema Bags > Test Report by Jason BoyleSierra Designs Nahche Sleeping BagTest SeriesInitial Report - November 17, 2007Field Report - January 20, 2008Long Term Report - April 9, 2008
Tester Information:
Backpacking Background:
Product Information:
Product Description:
Initial Report – November 16, 2007 Initial Impressions:
I laid the bag out on the floor of my living room and tried it out. Of course my daughter had to help me try it out too.
As stated earlier it is a mummy shaped bag and is a good 6 inches (15 cm) longer than I am tall and will provide me room to stuff some clothing into the foot of the bag. I expected the bag to be generously cut in the chest, but when I zipped the bag up completely it seemed a bit snug in the chest area. I am not sure if it was just because I had been playing with my daughter or what, but this an area that I will report on again in the Field Report. I like the Jacket shaped hood. I usually don’t get the most out of the hoods on my sleeping bags because I am a side sleeper and if I am using the hood I usually end up breathing into my bag, something I don’t want to do in really cold weather. Since the Nahche hood contours my head, I should be able to easily roll from side to side without burying my face in the bag. The pad locks are a good concept and work well based on my experience using them on my Sierra Designs Wicked Light Bag, however that bag doesn't have a hood like the Nahche. I probably won't use the pad locks on this bag because of the hood, I don't want to breathe into the bag.
I was skeptical that the bag would fit into the provided compression sack, but I was able to stuff it into the compression sack with ease and able to compress it to a size a little larger than a basketball. Another cool thing about the compression sack that is different from other compression sacks I have used is that there are two quick disconnect buckles and two normal tightening straps. On my other compression sacks there are 4 tightening straps, which usually turns into a mess once I pull the bag out of the sack and causes me to spend 10 minutes sorting the straps out before I can compress my sleeping bag. I look forward to getting the bag out into the elements for some real world testing. I will focus my testing on three main areas – fit, durability, and warmth. Summary:
Field Conditions/Report:
November 17-18, 2007 – Melakwa Lake, Alpine Lakes Wilderness: This trip involved a 5 mile (8 km) night hike through rain and light snow as we gained elevation. Final elevation was 4500’ (1370 m), with a low temperature of 25 F (- 4 C). I used the bag inside of a Black Diamond Lighthouse tent with a Therm-a-Rest Toughskin as my pad. I wore a dry pair of lightweight tights, a lightweight long sleeve shirt, dry socks, Sierra Designs Sleepies, and a beanie. I also used my REI silk liner inside the bag. I do this more to keep the sleeping bag clean than to provide additional warmth although I am sure it adds some. I slept pretty fitfully this night. I think I didn’t eat enough and though I was never cold, I think that is what caused my restlessness. November 21-22, 2007 – Lake Easton State Park: This was a car camping trip. Elevation was around 3000’ (910 m), with a low temperature of at least 18 F (-7 C). I slept in the bag under the stars with an Exped Downmat 9 DLX as my sleeping pad. I wore the same clothes as I had on the previous trip and slept pretty well except for some slightly chilled feet in the morning. I ate well the night before and had not performed any real physical exertion except some beer bottle curls. A nice thin layer of frost covered the bag in the morning except for the upper torso part which was clear. December 28 – 29, 2007 – Ollalie Lake, Alpine Lakes Wilderness: This trip involved a 3.5 mile (5.6 km) backpack though steady snow. Final elevation was 3900’ (1190 m) and the low temperature was 22 F (-5 C). I used the bag with a REI Minimalist bivy and my shelter was a Black Diamond Mega Light Tarp. I used an Exped Downmat 9 as my pad. The shelter was not set up very taut so as it snowed through the night the walls caved in a bit. Additionally there was a large amount of frozen condensation that would rain down during the night when I hit the walls to knock the snow off of them. I ate well this night, 2 packages of Ramen, various snacks while hiking, and a Butterfinger Candy bar right before bed. I only wore a pair of shorts, a dry L/S shirt, clean socks, Sierra Design Sleepies, and a beanie. The hood became damp from condensation overnight from brushing against the tarp wall. There was also some condensation on the bag between it and the bivy. However I was completely warm and never felt damp or cold inside of the bag.
I was initially concerned with the fit of the bag, however I am happy to report the bag is very roomy and there is plenty of room inside of the bag. I never felt constrained in any way and had plenty of room to stretch out. I was able to comfortably wear a light base layer while inside of the bag and had plenty of room to bring other clothes into the bag to dry overnight. The inner Cocona fabric is soft and nice to snuggle into. The hood fits well and I really like how it conforms to my head and turns with me. I am happy to report that when the hood is completely cinched down that there are no annoying toggles, or excess cords to get in the way, and that the hook and loop fastener is not anywhere near the face. The durability of the bag has been good thus far. I mentioned some condensation and frost forming on the shell on a couple of the trips, but neither appeared to penetrate the Primaloft fill and create a cold or wet spot. One area I am surprised about is that Primaloft doesn’t loft very much. I am used to down bags that have incredible loft after being compressed. I don’t think that anything is wrong with the bag, just surprised that the bag doesn’t loft much. The “Snag Free Zipper Tracks” have done a good job as I have not snagged the zipper on the bag. I really like the long zipper, it makes getting into and out of the bag very easy. I have also been pleased with the warmth thus far. In my opinion what I eat is almost as important as the bag and I have tried really hard to make sure I am eating enough. I am not completely sure what to make of the frost that appeared every where on the bag at Lake Easton except on the chest area. I don’t think I tossed and turned too much which might have cleared it. If there is an area where heat loss was occurring it would cause the frost to melt, but I hope that is not the case as I hope that the torso area would have good insulation to keep my core warm. I will investigate this further as I try to get in colder temperatures.
Summary:
Field Conditions:
January 20-21, 2008 – Gold Creek Basin, Snoqualmie Pass, Washington: This trip was a mile and a half (2.4 km) snowshoe to a neat little overlook I found earlier in the winter. Elevation was around 3000’ (914 m) and temperatures ranged from 0 F to 32 F (-17 C to 0 C). I used the bag inside of an MSR Dragontail tent and used an Exped Downmat 9 as my sleeping pad. I wore a lightweight turtleneck, tights, clean wool socks, down socks, North Face down booties, beanie and a pair of fleece mitts. It sounds like a lot of clothing but it was my normal winter clothing. I ate half of a dehydrated meal, some brownies, a small Larabar, and some M & M’s. This was my coldest night in the bag and I was surprisingly warm all night. March 14-16, 2008 – Hannegan Pass, North Cascades, Washington: This trip was a 5 mile (8 km) snowshoe to our camping spot, then 6 miles (9.6 km) of snowshoeing further up the valley the following day before heading out the way we came on the third day. Elevation was around 3000’ (914 m) and temperatures ranged from 24 F to 32 F (-4 C to 0 C). I used the bag inside of an MSR Dragontail tent and used an Exped Downmat 9 as my sleeping pad. I wore a short sleeve t shirt, a pair of shirts, clean socks, a beanie, and my down booties. I ate cooked meals each night and had lots of snacks like pastrami and cheese so there were plenty of calories. I slept well each night as expected, because of the warm temperatures. There was some condensation in the tent that fell on the bag but nothing penetrated the shell. Report:
The durability of the bag has continued to be good. I haven’t noticed any issues with the shell, inner lining, or zipper. There hasn’t been any Primaloft leakage through the seams, though I didn’t really expect there to be. Even though the bag doesn’t really loft much, I have not seen any loft degradation or compression over the last four months. I have used the included compression sack for storage while backpacking and the included laundry sack for storage at home. I encountered some condensation, but stayed nice and dry inside of the bag. The shell and Primaloft repelled the condensation easily, but I am not sure that I would want to use the bag in the rain without a bivy. I wasn’t sure I would get to 0 F (-17 C) but was pleasantly surprised by a clear, cold night in the Cascades. I was able to sleep comfortably on my down mat with no issues. I made sure to eat plenty to keep my internal furnace going, but I think the bag did a good job and I didn’t need to add any extra layering to stay warm. I want to reiterate that what I eat is as important as the bag is when trying to stay warm. It takes a lot more calories to stay warm in cold weather so I always tried to make sure I was getting adequate calories to keep me warm overnight and I usually kept a gel or some nuts close by on the cold nights in case I needed an extra boost to keep me warm. This concludes my Long Term Report. Thanks to Backpackgeartest.org and Sierra Designs for allowing me to participate in this test.
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