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  • Klymit - KSB 20 Down Sleeping Bag - Red
    Klymit - KSB 20 Down Sleeping Bag - Detail
    Klymit - KSB 20 Down Sleeping Bag - 3/4 Front
    Klymit - KSB 20 Down Sleeping Bag - Stuff sack / pack
  • Klymit - KSB 20 Down Sleeping Bag - Detail
Klymit - KSB 20 Down Sleeping Bag

Klymit KSB 20 Down Sleeping Bag

36% Off
$159.98 $249.95

Item #KLT001D



Tech Specs

20D nylon ripstop, DWR coating
650-fill duck down
Shoulder Circumference:
Hip Circumference:
Foot Circumference:
Bag Length:
Draft Tube:
1 stash
Storage Sack:
Stuff Sack:
Stuff Size:
13 x 8.5in
Claimed Weight:
2lb 12oz
Recommended Use:
backpacking, camping
Manufacturer Warranty:
limited lifetime

One Man's Trash is Another Man's Treasure.

Don't let the Klymit KSB 20 Down Sleeping Bag's trash bag silhouette fool you into thinking that it's anything but a treasure. The KSB weighs in at 2lb 12oz and touts a budget-friendly price tag despite its technical features and lightweight constitution. A 20-degree temperature rating makes the bag ideal for three-season adventures when temperatures are cool. Stretch baffles provide unencumbered mobility, so you're able move around in your sleep or snooze on your side without your sleeping bag restricting your movement. A cozy lining offers a silk-inspired feel and prevents the buildup of moisture, while the 650-fill duck down provides lofted warmth in the face of cool temperatures. A draft collar bolsters your defense against cold air, and the half-moon footbox retains warmth better than conventional footboxes.

  • A 20-degree sleeping bag for three-season snoozing
  • Lightweight design is ideal for backpacking or camping
  • 650-fill maintains loft and is suitable for dry climates
  • DWR treatment fends off moisture and light precipitation
  • Stash pocket is ideal for headlamp, phone, or wallet
  • Stretch baffling provides an adaptive fit

Really Awesome Sleeping Bag

  • Familiarity: I've used it several times

Klymit has it dialed when it comes to sleep systems. This bag is not only very comfortable, but it is also super reliable within the suggested temps. I was always warm and slept like a baby in it.

Great to stretch out in!

  • Familiarity: I've put it through the wringer

This pack is fairly versatile but what I loved about it most is how much space you have to kind of spwal out! The stretch adds a bit more comfort depending if you sleep on your side! The chimney venting allows you to cool down if it gets too hot! An amazing bag that is great for comfort and pack size!

Packs down and is super cozy!

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

This is a great sleeping bag. The first thing that impressed me was how much it can compress. I used my own compression dry sack to try to get a little less volume taken up in my pack and was pleasantly surprised with its ability to squeeze down. It kept me super warm and was very comfy to sleep in!


    I especially enjoy this bags efficiency in conserving body heat. The expandable sides allow for your body to be heating only the amount of the bag your body is taking up. They also allow you to be able to curl up without getting tangled in your bag. Being only 5'4 tall, finding a bag that fits me well is a bit hard. I appreciate the tethers at the bottom of the bag to adjust the bags length. At its smallest, this bag fits me well.


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

    LOVE the three-season sleeping bag!! keeps you warm and comfy all night long. its breathable and water resistant which helps with condensation. love the baffles across my legs for easy movement. the adjustable length is great since I'm 5' 2". there is stash pockets and packs nice for compact travel.

    Heed the Temp Rating.

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

    The temperature rating is right on the money.
    I used this bag when road tripping through snowy Lake Tahoe, and just slept in the back of my Jeep. The temperature at night dropped to about 10 degrees, and I'm thankful I had an extra blanket to throw on top of me.

    So if you're sure you're going to be camping in 20-40 degree weather, you'll be totally fine. But if you know it's going to be a bit colder, you might want to go to a 0 degree bag.

    Other than that, it's beyond cozy.

    Nice and warm in a small package

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

    I'll admit right away that I'm not the camping person and that my idea of camping is in my van with a fan some A/C or a heater. That being said I thought why not give a better sleeping bag a shot and skip the heater, let's not get crazy I still had my 12 volt fan blowing at me.

    I have found that I struggle in sleeping bags as I do tend to sleep on my stomach / side which doesn't usually go hand in hand with mummy type bags. I did find this one in regular length had plenty of room for my 5'9" stature to move around . During the night the temps got down to I would say about mid 30's in the van and I still had the fan blowing on me and the bag unzipped a bit and I was still comfortable. I also used the bag on my air filled sleeping pad which I like in the summer time but not so much in the colder temps as it pulls heat out of you. Even with that underneath the bag I was still plenty warm in my PJ's.

    If you need a decent sleeping bag don't hesitate to give this one a try.

    For reference I'm 5'9" 32" inseam and 43" chest at 175 lbs

    Good Companion, decent construction

    • Familiarity: I've used it several times

    As a tall person the ability to be comfortable in a mummy bag is essential. For Klymit to create this bag with such elasticity it was perfect for my 6'3 frame without the added cost of getting a 'tall' bag. The construction of the foot box was creative and comfy with the added benefit of shortening the whole bag for smaller users.
    The complaints I have come from the zipper. I struggled accessing the inside zipper and snagged on the thinner fabric around the closure.
    The heat retaining stretchy baffles were perfect for my ever moving sleep patterns. Was perfectly warm in temperatures anywhere from 50-15 degrees.
    Will be looking forward to trying Klymit's updated 0' bag for winter activities.

    Game changing

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

    This review is going to incorporate my overall enthusiasm for all of Klymit's offerings. As an avid bikepacker and backpacker I'm no stranger to trying to save weight and space in my packs so I can enjoy the journey at hand without sacrificing on comfort . Klymit has a number of products, mainly sleeping bags and pads, that pack down small, are lightweight, and are priced such that you will still be able to afford that time off of work for those extended trips.
    This bag is no exception to Klymit's above formula. I especially appreciated the freedom of movement due to it's built in elasticity.; et it still retained that warmth and snuggly-ness we're all after in a mummy bag..

    Super cool!!!

    very comfortable, reasonable weight

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

    I spent a couple nights in this bag and have initial impressions to share.

    First off, this bag is incredibly comfortable. I am used to a synthetic bag so the down was a nice change of pace. I get cold somewhat easily while sleeping and in the low 30's I was warm with minimal clothing.

    The bag packs down pretty small when packed and expands nicely once it's out. If I were to purchase this bag, I would pair it with a compression sack to get the volume down even further.

    At 6'2.5" the bag was long enough for me, which is not always the case with "normal" length sleeping bags.


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

    It is very light and warm.
    3 season sleeping bag is very suitable for me.


      This bag is very compact, which is what i was looking for in a backpacking sleeping bag. It also is very comfortable, this sleeping bag allows me to stretch out my legs unlike most sleeping bags.

      Warmth and Freedom in one

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

      Before this bag you could buy a mummy for warmth or a more square bag for leg freedom. with Kymit's stretch baffling you can now have both! You can also bring the foot box in if you're not tall enough to fill the whole bad. Minimizing air space is what will keep you warm when you're sleeping. I am so stoked to get out and use this bag even more.

      Initial impressions!

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

      The first thing that caught my eye was the stretch baffling. The bag is shaped like a traditional mummy bag, but the seams of the baffles are elastic allowing for movement and a customized fit. Killer design!

      Initial Impressions-- Money!!

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

      I start this review off with a disclaimer***
      I have only used this bag for one weekend camping trip so far, and the lowest temp it got to was mid 40's. I won't be able to speak for how well it performs in cold yet

      The bag has a great feel for the price and comes with a stuff sack and loose storage sack. That is a plus for users who want the loft to last. It has elastic baffles, which I am skeptical of at this early time, but seem pretty cool. They add a little scratchiness to the overall bag feel when you are inside. but if you are claustrophobic or hate mummy bags, this would be an awesome feature for you. You legit can spread out if you need, and when you don't, the elastic brings the bag back close to your body to keep you warm. I am still able to get the zipper snagged, and I wish it came with a left orientation, but the zipper really is an improvement from Marmot, Big Agnes, and other brands of bags I have used. I needed to have the bag fully unzipped for most the night that was in the 40's, but it has a nice draft collar and baffles around the zippers to keep things warm.

      The bag is a little heavy for a down backpacking bag, but if you can get it quite small. I bought a Sea to Summit dry compression bag (size M 14L) for it, and can get it down to a pretty tiny nugget with minimal effort. I will sacrifice a little weight for a nice bag at this price though. I am not backpacking hundreds of miles a year and commonly car camp.

      For the price, the initial quality and full lineup of features seems worth it. I will swing back if things change and also try to add a pic of it compressed.

      Initial impressions good!

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

      I was surprised with this bag. Great features such as a truly no-snag zipper (finally), baffles along the entire length of the zipper to keep out drafts, a draft collar with stowable velcro closures (no scratch on your skin), and stuff sack plus loose storage mesh bag. A little on the heavy side for a backpacking bag (~3lbs), but seems to be quite warm. Looking forward to testing it in the elements!

      Hopefully it will serve you well this summer out in Hawaii.