Free 2-Day Shipping on Orders Over $50

Detail Images

  • Western Mountaineering - Detail
  • Western Mountaineering - Back
  • Western Mountaineering - Back
  • Western Mountaineering - Nanolite Quilt: 38 Degree Down - One Color
  • Western Mountaineering - Detail -
  • Western Mountaineering - Back -
  • Western Mountaineering - Back -

Current Color

  • Western Mountaineering - Nanolite Quilt: 38 Degree Down - One Color

Western Mountaineering Nanolite Quilt: 38 Degree Down

$345.00 - $380.00

Free 2-Day shipping on orders over $50. Learn More

Select a Size:

Select options
  • Select options
    • Regular
    • Long

    Select a Color:

    Select options
  • Select options
    • One Color

    5 Reviews


    Shave weight, save space, sleep tight.

    After years of being hounded by ultralight fanatics and weight-conscious backpackers, Western Mountaineering finally gave in and created the Nanolite 38 Quilt. This unbelievably lightweight and compact quilt is primed for summer backpacking adventures where the nights are mild and the hikes are wild.

    The quilt concept is predicated on the idea that you don't need insulation on the bottom of the bag, because when you lie down on it, the down gets compressed and doesn't insulate anyway. Instead, quilts use the insulating power of your inflatable sleeping pad to do the insulating for them. By cutting out the excess insulation and zippers, it significantly reduces weight and bulk. The Nanolite features a simple attachment system that secures it to any mummy-shaped sleeping pad, so you get a warm, comfy night's sleep without worrying about your pad slipping out from under you.

    Another advantage of this quilt is that it offers more room in the top and hips, making it ideal for side-sleepers and campers who shift around a lot throughout the night. And while a lot of quilts on the market suffer from poor closure leading to excessive heat loss, the Nanolite has a top collar that drapes around your shoulders to lock in core heat. Not to mention, the entire thing clocks in at well under a pound and packs down to the size of your water bottle, making it the superior choice for summer backpacking trips.

    • Ultralight and low-bulk quilt for backpacking
    • Integrates with any mummy sleeping pad for maximum efficiency
    • 850+ fill down is exceptionally light, warm, and compressible
    • Top collar drapes around shoulders to lock in heat
    • Design is optimal for all body types and sizes, and side sleepers
    • Simple bottom closure from shoulder to foot
    • Packs down to roughly the size of a 32oz water bottle
    • 7D fabric is featherlight
    • Item #WES001H

    Tech Specs

    7D nylon
    850+ fill down
    bottom closure system
    Max User Height
    [Regular] 5ft 8in, [Long] 6ft 4in
    Fill Weight
    [Regular] 6.5oz, [Long] 7.25oz
    Stuff Sack
    Claimed Weight
    [Regular] 11oz, [Long] 12.5oz
    Recommended Use
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Warm and light

    • Familiarity: I've used it once or twice and have initial impressions

    I have only been able to shortly test this quilt in my hammock. I used it in my hammock for approximately 2 hrs on a 34 degree, windy day. I only wore shorts, long sleeve merino wool shirt and my Western Mountaineering Slinglite underquilt. Without a doubt the quilt is warm. The quilt packs down amazing and is so light. Western Mountaineering makes a great product.

    Excellent quality, true to temp rating

    • Familiarity: I've put it through the wringer

    I've used this two nights in some unexpectedly colder weather than forcasted and I was able to stay comfortable with baselayers and my down jacket on. I'm not a fan of the strapping system, it could use some work frankly. I ended up modifying it myself with some flat clips added to the loops. Love the collar, love the weight, the fill feels substantial. Great product, could use some refining.

    I've been using this all through this spring and summer now and have yet to have any issues with it. With about 20 nights on it, the temperature rating is perfect for the warmer months. The collar is so surprisingly useful for locking in a bit of extra warmth when needed. The closure system could use some love but at the temps its intended for it doesn't matter if it gets a perfect seal, I just lay it on top of me mostly anyways.

    Ultra lightweight...

      I will be using the nano quilt with a therma rest z lite sleeping pad for my AT hiking. The 6'4" long quilt and the small z lite pad total 22.5 oz. The shell seems durable considering the weight and it packs into its own small pouch which will easily fit into any pack. Impressive product so far.

      Light and Warm

      • Familiarity: I've used it once or twice and have initial impressions

      I was able to use an early prototype version of the Astralite last summer on a backpacking trip in the Wind River Range. Because of the total weight I was carrying, aided by the scant 11.25 ounces of the Astralite, I moved way faster than I had planned. I blew past first planned campsite by lunch time and ended up nearly 20 miles down the trail at an altitude of about 11,500'. It was way colder up there than I had planned, dipping below freezing if I judge by the frozen groundwater runoff the next morning. But despite the 38 degree rating I was still perfectly comfortable in the Astralite.
      I use a 20"x72" rectangular sleeping pad and had no problems wrapping the quilt's cords around the pad and just kicked the bottom of the pad under the bag's foot. No problems.
      Also, the bag I used was 5'8", but I'm 6' and I had no issues. I think the Regular length is designed for 6' users, but the actual length of bag is 5'8" because it doesn't have a hood. Similarly, I would assume the 6'4" Long would fit a taller user.
      The fabric is very light, so it should be treated carefully, or at least not dragged all over camp. The only criticism was the bungee cord on the back, which integrates the bag to a pad, was too long. I was told they were going to fix this when it launched this spring.
      Overall, great bag! Super light and very warm.