Patented Pad Attachment System - Widely considered the best design on the market for preventing drafts. Offers unmatched versatility, comfort and efficiency in a quilt style sleeping bag. For more information view our Product Manual. Also comes with removable webbing straps for use without a sleeping pad.

Elastic Binding Around Bottom Opening - Elastic binding around the bottom opening prevents gaps and drafts at the sleeping pad.

Differential Cut - A critical factor in quilt style bags with adjustable girth, differential cut allows for maximum loft from our premium down.

Continuous Baffles - With continuous baffles the down can be manually moved as temperatures dictate for maximum versatility.

Down Filled Collar - Our overstuffed collar fits comfortably against your neck to seal this critical area from drafts.

Trapezoidal Foot Box - We have shaped our foot box for the greatest comfort, warmth and efficiency.

Internal Stash Pocket - Keep your phone warm and easy to find, or keep your water filter from freezing.

Overstuffed Baffles over the Foot Section - Provides extra insulation over your feet to ensure toasty toes.

Overfill Available: For more information or to order overfill click here.

Shell imported. Designed, filled, finished and stringently inspected in Colorado.

Included
Free Shipping in the United States
Silnylon Stuff Sack
Storage Bag - 100% recycled, breathable fabric
2mm Cords for attaching to your pad

Specs

Small

Regular

Long

Small Wide

Regular Wide

Long Wide

Fits To

5'6"

6'

6'6"

5'6"

6'

6'6"

Fill Weight (ounces)

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

14.2

13.2

15.2

14.1

16.3

15.2

15.6

14.5

16.6

15.5

17.8

16.6

Total Weight (ounces)

21.9

20.9

23.3

22.2

24.8

23.6

23.7

22.6

25.4

24.2

27.0

25.7

Loft Single Side

2.75"

Shoulder Width

54 inches (Similar to 63" mummy bag)

58 inches (Similar to 67" mummy bag)

Hip Width

46 inches

50 inches

Foot Girth

40 inches

44 inches

Footbox Length

23 inches

25 inches

26.5 inches

23 inches

25 inches

26.5 inches

Packed Size

6.5 X 11.5 inches 6.5 Liters

7 X 12 inches 8 Liters

Due to variances in raw materials, finished weight my vary by +/- 5%

◄ Metric Specs

Specs

Small

Regular

Long

Small Wide

Regular Wide

Long Wide

Fits To

167.5cm

183cm

198cm

167.5cm

183cm

198cm

Fill Weight (grams)

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

850fp

900fp

404

375

431

401

462

430

441

410

471

438

505

470

Total Weight (grams)

620

591

660

630

703

670

672

641

719

686

765

729

Loft Single Side

7cm

Shoulder Width

137cm (Similar to 160cm mummy bag)

147cm (Similar to 170cm mummy bag)

Hip Width

117cm

127cm

Foot Girth

102cm

112cm

Footbox Length

58.5cm

63.5cm

67.5cm

58.5cm

63.5cm

67.5cm

Packed Size

16.5cm X 29.2cm 6.5 Liters

17.8cm X 30.5cm 8 Liters

Sustainability

Why yes, we do think it matters. It matters a lot!

From the fine details to big picture goals, we know our decisions about materials, partnerships, and daily operations can have far reaching effects outside this building. Climate change affects us all. It is personal. We have more progress to make, but here are a few ways we currently prioritize sustainability.
1. Reduce demand for raw materials
2. Reduce the use of harmful chemicals
While Katabatic Gear is committed to making UL gear that exceeds your expectations, it is equally important that we minimize our negative impact on the planet and its occupants. Whether it’s a special place in the backcountry, or the city you live in, we want to do our part to maintain healthy land, air, and water to keep this a comfy home for all. Though ours is not a perfect plan, we will continue to search for ways to improve our sustainability efforts, and minimize the impact of our operations on the planet.

Want to join the effort to reduce the impact of your purchase? Make sure you keep Route Package Protection selected during checkout. Not only will your package be protected against loss/theft/damage, but Route also neutralizes shipping emissions on all covered shipments.
Responsibly Sourced Down
Like many of our customers, we at Katabatic Gear are concerned with the environmental and animal welfare impact of our products. We are dedicated to a responsibly sourced, and very high quality product, just like our down supplier, Allied Feather and Down. They are certified through both the bluesign®and Responsible Down Standard®programs. Another reason we partner with Allied: we can offer our customers access to the Track My Down program. It allows our customers to learn everything there is to know about the down in their specific quilt.
900 Fill Power Goose Down
We use the highest quality 900 Fill Power goose down, offering the most loft and warmth for the least weight. Goose down has many advantages over synthetic insulations. In warm temperatures goose down allows heat to pass through, giving it a wider comfort range than synthetic insulation. The down can be intentionally moved around in its baffles, allowing you to adjust the amount of insulation based on conditions. Finally, synthetic insulation breaks down more quickly with use, losing loft and warmth. As a result a down filled product has a life span many times that of a synthetic filled product, making down a much better value. Our 900 Fill Power premium goose down is produced for us here in the U.S. by Allied Feather, and is available untreated or with ExpeDRY™ water-resistant treatment.
850 Fill Power Duck Down
With all the benefits of down vs. synthetic, duck down is often cheaper than goose down, only due to the fact that it is more widely available. For years it was difficult to obtain duck down in a fill power greater than 700, which meant a heavier sleeping bag. Now that we can get responsibly sourced, high quality, 850 f.p. duck down, we are happy to be able to offer it to our customers. There are no quality, performance, or longevity sacrifices in buying a duck vs. goose product. One potential downside is that the natural animal odor that can be present in down products is more common to duck down than goose. This does not mean your duck down will necessarily have an odor, or that goose down will not. It varies from one lot of down to the next, and we’re told it is due to the birds’ diet. Some folks don’t notice any odor, while those more scent sensitive might, particularly if the bag is damp. As one customer put it, “Who cares! In a week or two it’s going to smell like MY odor.” Our 850 Fill Power premium duck down is also produced for us here in the U.S. by Allied Feather, and is offered with ExpeDRY™ water-resistant treatment.
ExpeDRY™ Water-Resistant Down
We are pleased to offer ExpeDRY™ ultra dry down. This down has been treated to provide additional resistance to unwanted moisture. In conjunction with our highly water-resistant shell materials, ExpeDRY™ provides extra peace of mind, and dries faster than untreated down if it does get wet. Is this a miracle water-proofing that will allow you to sleep out in the rain or dunk your bag in water with wild abandon? No. Will it give you extra protection and help maintain loft in damp conditions? Absolutely! Produced for us here in the U.S. by Allied Feather. Available in 900fp goose down and 850fp duck down.
Pertex Quantum Eco Ripstop (.85 oz/yd)
The best fabric you’ll find for the shell of an ultralight sleeping bag.
1. Keeps your insulation drier: Best DWR we’ve tested
2. Keeps your insulation loftier: Lightweight, soft, breathable, and downproof
3. Reduces demand for raw materials: Eco version of Pertex Quantum is made from recycled yarns and maintains the fabric’s advanced performance qualities
Pertex Quantum Taffeta (1.0 oz/yd)
The softest fabric you’ll find for the liner of an ultralight sleeping bag. This Pertex Quantum plain weave makes for a silky soft liner fabric on the inside of our quilts. We get tons of customer feedback stating that it’s the most comfortable sleeping bag fabric to ever brush up against them – not as clammy or crinkly as other fabrics.
Quilt Style Sleeping Bag
The idea behind a quilt style sleeping bag is to eliminate the insulation from the bottom of a conventional sleeping bag. Why? Insulation must have loft and trap air in order to be effective. Since any insulation beneath your body gets crushed, it is wasted. So why not leave the insulation (and the fabric and all that weight) out of the bottom of the bag? This is what a quilt style sleeping bag does, but it goes one step further.

When a quilt style sleeping bag is designed well, versatility is significantly increased. Our patented pad attachment system and elasticized edging keep your body heat in and the cold drafts out. When conditions are warm, lay the quilt over you like a blanket and allow some ventilation. There are numerous variations in between, making our quilts comfortable in a much wider range of temperatures than a traditional sleeping bag. Another huge benefit of a well designed quilt: you can toss and turn and roll around without getting tangled up or rolling off your pad!

Attachment System
The backbone of our down quilt style sleeping bags is our patented Cord Clip attachment system. The beauty of this design is its simplicity. All our bags feature our Cord Clips, and come with 2mm cord for attaching the sleeping bag to the pad. Simply cinch the cords around the pad, and attach your bag! This system works easily with most sleeping pads.

Our Cord Clips feature two attachment options for maximum versatility. The first attachment position allows the clip to slide freely on the cord. For warm weather this gives you the most freedom of movement. As the temperature drops, clipping into the second position allows you to lock the bag in place on the cord. In this position you can control the girth of the bag, and are able to set the bag to overlap your pad to lock out drafts. Even with the Cord Clip in this position, adjustment along the cord is easily accomplished by lifting the Cord Clip vertically. With the Cord Clip held vertically it slides easily along the cord. Returning the clip to its horizontal position locks the Cord Clip in place along the cord. This allows you to adjust the interior volume of the sleeping bag, as well as adjust the bags position on top of the sleeping pad. Secondary clips help seal out drafts when the temperature really drops. This unique design offers significant advantages. The ability to attach your sleeping bag to the top of the pad, as well as the ability to easily adjust the girth/volume of the bag, allows you to optimize the position of the bag depending on your sleep position, and the level of warmth you need from your bag. In warm weather you have much more room than you are used to in a mummy bag. In cold weather just close the bag in around you for maximum warmth.

We have engineered our Cord Clips to be strong and durable, while being thin and unobtrusive. Even if you have your sleeping bag pulled in under your body, our Cord Clips are designed to lie flat and to be unnoticeable. Our Cord Clip system is fast, simple and easy to use. Attach the cords around your pad before you leave home. Then just lay out your pad, clip your bag on to it, adjust as needed, and sleep!

Differential Cut
Our sleeping bags feature a substantial differential cut, which is highly beneficial in a quilt style sleeping bag with adjustable girth. The shell fabric is cut wider than the liner fabric, making the circumference of the shell larger than that of the liner. This means that when you start to draw the bag in on a cold night, you’re less likely to crush the insulation creating cold spots. This is a detail that many manufacturers overlook, but we think it’s one of the keys to a more effective quilt, and a warmer night’s sleep.

Continuous Baffles
The baffles in our quilt style sleeping bags are continuous from one side to the other. This allows down to be moved to the top, sides, or bottom of the quilt when temperatures fluctuate. On warm nights, you can move the down to the sides or bottom, allowing a little heat to escape. On cold nights, move more down to the top of the quilt to keep that body heat in. This works particularly well when the quilt is attached to your pad, because the same part of the bag is always on top, no matter how you roll, toss, or turn.

Down Collar
Our quilts feature an overstuffed down collar around the neck opening. This critical feature means you can comfortably seal warmth inside your sleeping bag without choking yourself with a scrawny drawcord.

Trapezoidal Foot Box
Optimized for when you need the most room, lying on your back, our trapezoidal foot box fits great no matter what position you are lying in. Plus we overstuff the baffles over the foot section to provide extra warmth. Our goal is simple: we want you to have warm, happy feet while you sleep.

Separate Hood
When you think about it, a separate hood really makes sense. If you toss and turn, your quilt stays in place on top of your pad, and your hood stays in place on top of your head. You are not going to wake up in the middle of the night, lost somewhere in your mummy bag, wondering which way leads out.

Do you need a hood? Here is what we have found: if temperatures are going to be near the temperature rating of your quilt, then you will probably need a hood. If the forecast calls for warmer weather, leave the hood at home, and just wear a warm hat to bed. Looking to save weight and get the most use out of minimal gear? Take a warm jacket with a hood, and wear that to bed if the weather is cold. You keep your head warm, and add extra warmth to your entire sleep system.

Bivy Sack in Conjunction with Quilt
Our water resistant, highly breathable bivy sacks are designed for use under a tarp or floorless shelter. These bivy sacks provide a waterproof floor, full bug protection, and a water resistant upper to protect your quilt from spray and mist. Our bivy sacks are designed to integrate perfectly with our quilts. Simply attach your pad to the floor of the bivy through the pad attachment cords, then clip your quilt on to these same cords. Your pad stays in place in the bivy; your bag stays in place on the pad. Leave your pad attached to the bivy and setup the next night is a breeze.

The System as a Whole
What does it all mean? Set up and adjustment are quick and simple. The quilt stays in place on top of your pad. The hood stays in place on your head. All our components are designed to work together, but the system is also designed to make the most of gear you already have. Our quilts can be partnered with almost any sleeping pad you like. Use your hooded jacket or a warm hat on cold nights. Use the tent you already own, or partner our bivy with your tarp. All in all, you are making the most out of every piece of gear, while resting comfortably no matter what position you sleep in.

The bottom line? Our sleep system is much more versatile than any conventional sleeping bag, and it weighs a lot less!

Made the switch from mummy bag to quilt

This was my first time using a quilt after years of feeling constricted in a mummy bag. I used the Alsek for the first time on the Lost Coast Trail in Northern CA for 3 nights this month in temperatures in the mid 30s. Conditions were wet and windy so definitely not ideal. I had condensation build up inside my single wall tent as I was sleeping by rivers and the ocean. I'm a cold sleeper but I stayed very warm and was much more comfortable being able to toss and turn. The outside of my quilt got water droplets on it but I brushed them off in the morning with none of it soaking in. The material is really nice quality and the pad attachment system for the straps allowed it to move with me in my sleep.

The same week another couple suffered severe hypothermia on the trail from the cold, wet, and windy conditions and had to call for help. This is a piece of quality gear that really proved itself on this trip. I recommend it and could have probably gone down another 10 degrees comfortably.

Great quilt and service

The quilt feels very nice. It came standard with things that are extra on other quilts- pad straps, storage bags, and stuff sack. I'm excited to use it soon.

Best for AT

Every piece of equipment I began with was ultimately upgrades to best accommodate comfort and reliability except for one. I was concerned from the beginning how durable this bag could be considering its weight but it proved to be extremely tough and resilient. I was never cold and after learning how to properly use the anti draft system, I never experienced drafts. My bag has an extra two ounces overfill and it couldn't have worked out better. This bag did not disappoint

Best quilt out there

I used this quilt for the entirety of my northbound pacific crest trail thru hike from may 16th to august 2nd. I had no complaints on my 850 fill alsek. Paired with a full length length thermarest neoair, and one pad strap, the only times I was cold was when I was low on food. Most of the time I did not use the strap, as even without any straps I did not have air gaps between the quilt and my pad. I carried only a very light mid layer and wind jacket, and was confident in the safety net this quilt and my single wall trecking pole shelter offered in the event of something going wrong. I appreciated the heavier ripstop on this compared to other quilt companies, as I am not gentle on gear, and have had issues with past quilts.
I never found myself never having to think about anything with the bag. Sleep with it, stuff it in my pack with a plastic shopping bag if it's wet, and repeat, day after day with no issues. The bag just works. The stitching pattern on the quilt solves the issue with the EE quilt's snail stitching pattern, where the down can bunch up. I never had to reshuffle the down in the quilt and I had no cold spots.
I plan on putting many more miles and long trails on my legs and am confident this bag will be there to hang.

Manque système international d'unités

Je suis acheteur français, et je trouve vraiment pénible et gênant de ne pas avoir l'équivalent des valeurs en système international d'unité (SI), Grammes, centimètre, degrés Celsius etc...

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