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3-season quilt | -1°C | 556 g Regular

900 FP HyperDRY™ water-resistant down

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475,00 €

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KATABATIC GEAR Flex 30°F / -1°C - is a versatile blanket style sleeping bag that can be used comfortably over a wide range of temperatures. It is perfect for thru-hikers or folks who need one sleeping bag to cover multiple seasons. It's versatile design allows to accommodate a greater range of temperatures more easily than a traditional sleeping bag. Cold nights you can regulated by adding layers. Zippered foot box offers numerous options for ventilation, you can use it fully open like a blanket, or close the footbox and cinch up.

The Katabatic Cord Clip attachment system easily latches on to any sleeping pad and offers unmatched flexibility in a quilt style sleeping bag. The elastic binding around the bottom opening prevents drafts at the base and also comes with removable webbing straps to be used without attaching to a sleeping pad. Watch attachment system video for more details. Katabatic conservative temperature ratings are usually a bit warmer compared to other brands with the same rating. Continuous horizontal baffles allow you to move the insulation and dial in the perfect amount of warmth for varying conditions. Baffles are generously filled to prevent unintended down migration in the middle of the night. The down filled collar maximizes the warmth and comfort of the draw cord closure.

Katabatic use the best raw materials Pertex Quantum for increased strength and water resistance with industry leading DWR.

Premium goose down provides the most effective warmth to weight ratio which is ethically sourced and RDS certified.    

Whether you are looking to reduce pack weight or increase the versatility of your sleep system the Flex is an adaptable blanket style sleeping bag that is perfect for the most of your spring, summer, and fall backpacking trips.
Katabatic Gear Foot Closure

WEIGHT: 556 g (Regular size)


Pertex Quantum Y Fuse ECO Ripstop - outer shell fabric, 0.85oz/yd
The best fabric you’ll find for the shell of an ultralight sleeping bag.

  • Keeps your insulation drier: Best DWR we’ve tested
  • Keeps your insulation loftier: Lightweight, soft, breathable, and downproof
  • Keeps your quilt out of the landfill: Pertex Y Fuse technology extends the longevity of this already durable UL fabric, and also improves its highly downproof and water beading properties
  • 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 DWR - silky soft liner fabric on the inside, 1.0oz/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.

Pertex Quantum

900 Fill Power Premium Goose Down produced in the U.S. (Allied Feather and Down) with HyperDRY™ water-resistant treatment to make it hydrophobic.

This down has been treated to provide additional resistance to unwanted moisture. In conjunction with highly water-resistant shell materials, HyperDRY™ 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! HyperDRY™ water-resistant down is bluesign® approved, so you can rest assured that it is safe for the environment and human health. 

katabatic logos


  • 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. 
  • Can Be Used Without a Sleeping Pad – Comes with removable webbing straps to be used without attaching to 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 goose down.
  • Continuous Baffles – With continuous baffles the down can be easily moved around in the bag as temperatures dictate for maximum versatility.
  • Down Filled Collar – Our overstuffed collar fits comfortably against your neck to seal this critical area from drafts.
  • Draft Blocking Foot Box Closure – When the temperature drops, and you need a closed foot box, our down-filled draft blocker and snap system fill the gaps, while allowing multiple venting options for warmer weather.
  • Overstuffed Baffles over the Foot Section – Provides extra insulation over your feet to ensure toasty toes.
  • Designed, filled, finished and stringently inspected in Colorado.


Silnylon Stuff Sack
Storage Bag - 100% recycled, breathable fabric
2mm Cords for attaching to your pad
Webbing straps

made in usa
Data sheet
Weight638 g
Warranty2 years
Made inUSA

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.
Katabatic Quilt Style Sleeping Bag
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.

Katabatic attachment system

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.

Katabatic 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!
Katabatic Gear quilt
Katabatic Gear’s Quilts: Attach on top of your sleeping pad for maximum warmth

Other quilt style sleeping bags strap under a sleeping pad instead of on top of the pad as our system does. This leaves a large draft tunnel inside the bag, particularly if you are a side sleeper. Your precious body heat is spent trying to warm this draft tunnel, which leaves less body heat for you. This design can also cause compressed insulation at your shoulder and hip. All this conspires to leave you cold.

Katabatic other quilts
Other Quilts: Attach under your sleeping pad, causing inefficient draft tunnels and loft compression

Differential Cut

Katabatic 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.
Katabatic Continuous baffles

Down Collar

Our sleeping bags feature an overstuffed down collar around the neck opening. This is a critical area to seal the warmth inside your sleeping bag. Our collar fits comfortably against your neck, and keeps the warm air where it belongs: inside your sleeping bag.

Katabatic Gear down collar

Versatile Foot Box

Our zippered foot box features a versatile system that offers numerous options for ventilation, or complete warmth. Along with the zipper, the drawstring, snap, and down-filled draft blocker allow you to decide whether you lock out the cold, allow in a little fresh air, or completely open up to a blanket.

Katabatic versatile footbox

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 Sleeping Bag

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.

Katabatic bivy sack

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? Katabatic Gear sleep system is much more versatile than any conventional sleeping bag, and it weighs a lot less!

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