Nighttime temperatures in Yosemite at August were at the reduced – to mid-30’s; at Sequoia-Kings in September, mid- to – high-20’s; and in West Virginia in May, low-40’s wet. I was comfy on all excursions, and concluded that the AstraLite’s 26-degree evaluation was appropriate and fair.

In the summer my sleeping relaxation is about 10 colder than the average backpacker. I purchase scarily thin and I usually cowboy camp, making me vulnerable to glowing heat loss and nighttime katabatic winds. To push on a sleeping bag or quilt to its advertised or EN-tested comfort temperature evaluation, I expect to sleep in most of my clothing (hiking shirt, shorts and panties, trekking pants, fleece mid-layer, and hooded down jacket).
I eliminated the uppermost loop, which is a few inches beneath the upper hemline. When this loop has been more engaged, it feels like you’re attached to a backboard, which beats a main selling point of vases: their own free-form nature.
Sleeping quilts cannot be EN tested. And with no apples-to-apples rating, we are not able to definitively answer the fundamental question when purchasing a sleeping bag or quilt,”What is the most thermally efficient bag with my essential price point, measurements, materials and structure, and business values?
The fantastic thing is that consumers have more options — in both the amount of manufacturers and the number of excellent goods — than ever before. If you do just a little bit of homework (e.g. online testimonials, and ideally in-person inspection), you’re almost guaranteed to be content with your purchase.
To remain comfortable on the September trips, when the lows were often at the AstraLite’s comfort limit, I swapped the Big Agnes Insulated AXL (my review) for a warmer Therm-a-Rest NeoAir XLite, and I more often employed the AstraLite’s draft closed system.

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I would not recommend it for humid or rainy climates. If you backpack primarily east of the one-hundredth meridian or west of the Cascades, look elsewhere.

Insulated draft yoke

In a one-week interval in April I fielded three inquiries concerning the Western Mountaineering AstraLite, that premiered in spring 2018 and which I’ve used for approximately 30 nights while scouting the Yosemite High Route in August, directing excursions in Sequoia-Kings at September, and enduring cold-and-wet states in West Virginia at May. I will use it in July at the High Sierra, but intentionally I’m not carrying it into Alaska this past month.
Buy now: Western Mountaineering Astralite

About the rear of this AstraLite, you will find 3 3/8-inch elastcized grosgrain webbing loops. (I eliminated one.) A sleeping pad can be inserted to them, to create a tighter seal between the quilt and pad.

Negative effect of the mat attachment program when engaged.
Products specs may shed some insight, however, it takes a deep dive into the details (e.g. attic, fill weight, width and length ), none of that can be individually verified and/or held to a market standard.

The article Long-term review: Western Mountaineering AstraLite
With quilts, it can be difficult to make sense of this width spec, that Western lists as, “around 68 inches.

The AstraLite was launched simultaneously with all the Western Mountaineering NanoLite, which can be lighter (11 oz) but less hot (38 levels ). If I had to critique the NanoLite specifically, my comments would be mostly the same.
However, you’ll cover it. At $420 MSRP, the AstraLite is more expensive than the top offerings from smaller direct-to-consumer brands like Enlightened Equipment, Nunatak, Katabatic, and ZPacks.
I see little sense in a duvet that is rated for temperatures colder than the high-20’s. Beyond that threshold, high-loft mind insulation is absolutely mandatory, and at that point you may too utilize a traditionally mummy bag, which can be easier and not as vulnerable to drafts.

The NanoLite is milder (and less heat ) than the AstraLite. At the Mountain Westit’d be quite a summertime-only product. It’d get more use from the warmer Southwest.

The AstraLite and NanoLite are indistinguishable in every way besides attic (which will be a function of the respective fill weights along with baffle heights). They share the same down quality, shell and lining cloths, baffle structure, pad attachment method, measurements, and throat yoke.
The listing of possible explanations is short. Either the downward (that is not treated to be water-resistant) has poor resistance to moisture, or even the fabric breathability is reduced. In any event, this really is a wonderful product for semi-arid and arid climates, but maybe perhaps not a great alternative for humid ones.
The yoke creates a significant difference in nighttime comfort, particularly when temperatures are approaching the duvet ’s comfort limit. But it still doesn’t equal the cocoon sensation of a mummy bag or the heat of this hideaway hood on the (notably heavier) Sierra Designs Nitro Quilt.
I don’t know the exact origin, however also the AstraLite (and the NanoLite, also ) floundered in consistently wet conditions. My quilt came into immediate contact with moisture (e.g. splatter, a dunking), however it was wetter than other luggage: customers observed it during a mid-day “reset dry,” plus it was quite clear to me following the trips when I was drying my quilt along with their demo bags.
Based on its performance in the High Sierra last year, I had been likely to provide the AstraLite a substantial thumbs-up. It supplies a great deal of warmth for just 16 oz. But after using it for 2 3-day cold-and-wet excursions in West Virginia, my endorsement is currently qualified.
The loops are both simple and powerful, but they’re somewhat fussy. I found it best to slip a partly inflated pad through the loops, then adjust as necessary, and then fully inflate the pad.
The AstraLite is an premium-grade product: produced in the united states, 850-fill humanist European goose , 4.5 inches of attic, 7d and 10d casing and liner fabrics, and an insulated neck yoke — and superior craftsmanship and customer support.

The AstraLite includes three 3/8-inch elasticized grosgrain webbing loops on its underside, through which a sleeping pad may be added. This creates a seal between the borders of the quilt and the sleeping pad, making the quilt work much more as a true top bag.
If I backpacked mostly from the warmer desert Southwest, I’d probably get more use from a NanoLite, since it’s comfort range contrasts more with with the prime backpacking months. But at the Mountain West, it would be suitable just for the warmest summertime, or for hot sleepers.

The AstraLite and NanoLite are both available in 2 lengths:

The neck yoke reduces markers by cinching softly around the throat.

Have questions about the AstraLite or NanoLite, or an experience with it? Leave an opinion.

AstraLite vs NanoLite

As a high quilt, the AstraLite performs wonderfully in a hammock or within a floor system (if you are a calm sleeper, then use its pad attachment system, or use it within a bivy sack).


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As a consequence of it absorbing ambient temperatures, the AstraLite was far less heat, doing much more like the NanoLite than a dry AstraLite. This issue had introduced itself slightly on my previous trips, but in the summertime Mountain West it had been considerably less noticeable.
The chief drawback of sleeping disorders is their draftiness. But calm sleepers like me shed heat round the shoulders and neck.
The AstraLite reduces drafts having a cozy neck yoke. To employ, snap both top corners together and tighten the cinch cord that runs through the quilt’s top hemline.
The bag wasn’t exposed straight to moisture, however only swallowed ambient humidity.


The AstraLite is the first sleeping comforter from Western Mountaineering. It weighs a sweet 16 oz (454 grams) and can be suitably rated to 26 degrees (-3 C), making it possibly the warmest-per-weight quilt available on the marketplace. It would be Great for:

I am able to ’t remember yet another quilt that got such attention, and I attribute that entirely to the manufacturer. Western Mountaineering was making premium down sleeping bags and insulated garments since the early-1970’s at San Jose, Calif. And it’s still owned by Gary Schaezlein, that co-founded the newest with Jeff Jones.