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  • The North Face - Furnace Sleeping Bag: 20 Degree Down - Striker Blue/Asphalt Grey

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  • The North Face - Furnace Sleeping Bag: 20 Degree Down - Striker Blue/Asphalt Grey

The North Face Furnace Sleeping Bag: 20 Degree Down

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    • Extra Long/Left Zip

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    • Striker Blue/Asphalt Grey

    18 Reviews


    Spend summer nights at altitude.

    It's July 4th, you're heading to Stanley, Idaho for some fun in the Sawtooths, and the weather forecast calls for a chance of snow. Or maybe it's the end of fall and you're getting one last backpacking weekend trip in before winter hits. Cram The North Face Furnace 20 Degree Down Sleeping Bag in your pack so you don't waste the mornings defrosting in front of a fire. This bag's shape gives you room to move during the night so you won't feel like you're wearing a straightjacket to sleep.
    The Furnace 20 is stuffed with 550-fill ProDown to maximize your slumbering comfort over a range of temperatures; the down is comfort-rated at 34F with a lower limit of 23F. Ordinary down offers the best warmth-to-weight ratio but will fall prey moisture, be it snow or sweat from a night terror involving camping pranks (your backpacking buddies are creative). ProDown dries faster than plain old down and repels moisture up to 10 times longer. Now, when various prank scenarios invade your dreams, your bag won't stay soggy throughout your trip.
    At your head, shoulders, hips, and toes, Heatseeker Eco synthetic insulation acts as an anti-compression pad to create a thermal barrier between you and the ground. Cold won't creep in as quickly and heat won't slip out so suddenly. The comfort-oriented mummy shape leaves room for you toss and turn. The vaulted footbox lets your toes wiggle without restraint, while the shaped hood and draft collar cuddle your clavicles. For shoulder-season and high-altitude summer warmth, turn to the Furnace 20.

    • EN comfort rating of 34F, lower limit of 23F
    • 550-fill ProDown
    • Comfort-oriented mummy shape
    • Heatseeker Eco anti-compression pads
    • Vaulted footbox
    • Shaped hood, draft collar
    • Stuff sack included
    • Item #TNF00BQ

    Tech Specs

    [shell] polyester taffeta, [lining] polyester taffeta
    550-fill ProDown
    [shell, lining] DWR treatment
    right, left
    Max User Height
    [regular] 6 ft, [long] 6 ft 6 in, [extra long] 7 ft
    Shoulder Circumference
    [regular] 63 in, [long] 64 in, [extra long] 65 in
    Hip Circumference
    [regular] 59 in, [long] 60 in, [extra long] 61 in
    Foot Circumference
    [regular] 44 in, [long] 45 in, [extra long] 46 in
    Bag Length
    [regular] 78 in, [long] 84 in, [extra long] 89 in
    Fill Weight
    [regular] 1 lb 6 oz, [long] 1 lb 11 oz, [extra long] 1 lb 15 oz
    20 F
    European Norm Comfort Rating
    34 F
    European Norm Lower Limit Rating
    23 F
    Stuff Sack
    Stuff Size
    9 x 17 in
    Claimed Weight
    [regular] 2 lb 10 oz, [long] 2 lb 15 oz, [extra long] 3 lb 5 oz
    Recommended Use
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Zipper gives out

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

    My bag, after some years, about 4, was great until the zipper quit closing. It zips but won't stay zipped. It is now worthless. I do not recommend it unless you want to buy new ones every 4 years or so. I know I can't afford to.

    Great for Backpacking

    • Familiarity: I gave it as a gift but have feedback to share

    This product is named perfect. It is one toasty bag, down insures that you stay warm on cold nights and is perfect for backpacking. It is very compressible and lightweight. The North Face nailed it on this bag!

    Nice for the price

    • Familiarity: I've put it through the wringer

    I've had this bag for almost two years, have taken it on quite a few trips, and am pretty satisfied with it. I most recently used it during an overnight trip in Shenandoah where temps reached mid-20's. I've also used it on two backcountry trips in the Canadian Rockies, and a couple of trips in Michigan where temps were also in the 20's. I tend to run cold, but really only needed my thermal underwear when temps were below 30.

    The bag is very compressible, so have no issues getting this, my tent, pad, and other gear in the 48L pack that I use for one-night trips. More than enough room in my 58L Osprey Exos - it actually fits in sideways at the bottom of the pack, which is nice.

    I'm 5' 9.75" and 170lbs and find it to be pretty roomy.

    Only drawback I've dealt with is the zipper snagging pretty regularly. I guess I've had that with every bag I've ever owned, though. The bag has held us pretty well, so I am hopeful I'll get a few more years of work out of it.

    warm and dry

    • Familiarity: I've used it several times

    This is the first down sleeping bag I have bought.
    Very light and cozy. Maybe be a little big for trekking but an excellent campsite sleeping bag. I am 6´3 and bought the long version, love how my feet are free to roam when I am asleep in this bag. Kept me warm and dry on Icelandic summer nights (around 8 degrees celcius) .
    would definetly recomend.

    This baby is money

    • Familiarity: I've used it several times

    This baby is money! The things I like most about it are that it's Blue for the BYU cougars and the LA Dodgers, and that there was an extra long version to fit my extra long body. This baby is money!

    Very nice, affordable, versatile

    • Familiarity: I've put it through the wringer

    I got this bag about 9 months ago and used it throughout the summer and fall months as a 3 season sleeping bag. I've slept comfortably in it at 10,000+ feet during the cooler mountain nights. I prefer down over synthetic, its lighter and will last the purchaser longer if they treat it properly. It feels at home in a car camping scenario or a backpacking scenario (light and packs small). I find the bag very roomy on the inside.
    I got to test the limits of this bag in January when I was on a road trip for a week. For me, I'd say the minimum comfortable low with this bag would be around 25-30 F. When it was 18 degrees F one night I had this sleeping bag stuffed inside a cheapo 45 degree rectangular bag, it was just OK. But I got to take advantage of the hood for once!
    My only complaint is the zipper sometimes gets stuck. This can be annoying if its dark and you can't see. Also the velcro by the zipper can scratch your face a bit, but that isn't a huge deal.
    Since I started camping and backpacking 9 months ago I have already upgraded to a lighter sleeping pad and am considering upgrading my shelter, but my 3-season bag will stay the same. I don't need to change it, this bag just fine for the beginner or the experienced outdoorsman.

    Delivers on the Description!

    • Familiarity: I've put it through the wringer

    I was headed to the Smokey Mountains Thanksgiving Week. 10 days prior to leaving the weather forecast called for temps to dip into the 20s at Altitude. I need a 20 degree bag (as I only had a 45* bag). After 2 days of scouring the internet & pouring thru reviews, both myself & hiking partner decided the best bang for our buck was TNF Furnace 20* bag. I'm 6 foot tall - 185lbs - long torso. I toss-n-turn all night long! I purchased the LONG. The bag was wide/big enough at the shoulders to let me toss/turn with ease. The Toe-Box is plenty big enough for my feet to be comfortable. The temps were worse than predicted - it got down to 22 degrees, 14 degrees (yes, 14!), 25 degrees, 33 degrees & 40 degrees on my trip. My sleep system consists of a NeoAir Trekker, TNF Furnace and Sea-to-Summit Cocoon sleeping bag liner. On the 3 cold nights, I threw everything in my sleeping bag with me - water filter, water bottle, hike clothes, jackets, boot liners. The LONG was big enough for all of my gear and my 6ft body to fit comfortably. I wore a skull cap, long sleeve shirt, long underwear, glove liners & camp socks to sleep in. I was never cold on any of those nights! On the 14 degree night I did have to throw some Hand Warmers into my socks to keep my feet warm. On the 25 degree nights my feet were a little chilled. I bought a Compression Sack to squeeze the bag as small as possible to fit into my backpack. The inside pocket for a Phone is a nice touch. Both my hiking partner & myself had a very favorable experience with our TNF Furnace 20 degree bag. It was worth every penny to have a WARM good night sleep.

    Great for the price!

    • Familiarity: I've used it several times

    I'm very pleased with this sleeping bag. The quality of materials seems very good overall, but the zippers are a little finicky on both mine and my husband's. We bought a right hand and left hand zipper bag so we could combine, and it works out really well.
    Solo, this bag still has plenty of room, and I'm not exactly small (5'9", 190 lbs). I will say this, though - on a recent trip it only dropped down to 35-40°F, and I was still pretty chilled even though I don't usually run cold. For this reason, I'd advise female buyers to either buy a warmer bag or wear very warm layers if it's going to be anywhere below 40°F.

    Just what I was looking for

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

    I was looking for a bag to take on a 4 night backpacking trip (and to use on backpacking trips for the next few years) and I initially bought one of the Big Agnes bags. That bag proved to be too bulky so I got this one instead. So far, I love it. It is light, warm, compresses well and is a really good price. I'm 5'8" and 160lbs and a sprawling sleeper. This bag is roomy and I didn't feel closed in at all. It dropped to low 30s on this trip and I was pretty toasty, so I am hoping that means it could go lower and still be comfortable.

    Happy with this purchase so far!

    Smaller than expected

    • Familiarity: I returned this product before using it

    I bought this bag to replace an older North Face Cat's Meow bag. My main reason for choosing this bag was the supposed roomier cut than the typical mummy bag. When the bag arrived I was surprised that it was not any roomier than my old North Face mummy bag. I'm 5'11 & 195lbs and ordered the regular size (fits to 6'0). I ended up purchasing one of the Big Agnes bags instead to get the extra room I was looking for.

    As for the bag seems to be pretty well made, fluffs up well and packs down to a reasonable size. It's also a nice looking bag. Overall a good choice for the money but buy bigger if in doubt.


    • Familiarity: I've used it several times

    I generally camp out of the car on mountain biking trips, so I wanted something that would give me a little more space when I was car camping but also pack up tight for backpacking. This bag fits the bill. I've only used it about 5 or 6 nights in the last 45 days or so, but it's been comfortable and easy to pack up.

    Seems well made, but only time will tell, I guess.

    Lightweight and Toasty!

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

    I just recently purchased this bag for an overnight backpacking trip. The down filling makes the bag light weight, warm, and easily compressed. The temperature got down to around 20 degrees the bag stayed comfortably warm as if I were in my bed back home. It's not as tight as a traditional mummy bag which was nice because it allowed me to burrow and curl up. I'm 5'4 and got the regular size bag. My only complaint is that I didn't pack a sleeping mat. Even though the bottom is designed to prevent cold from seeping in quickly it doesn't protect you from it completely. Had I had a mat for separation I would have been 100% comfortable. Still my feet stayed warm which is usually a problem in other sleeping systems I've used.

    Great first timer bag.

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

    This bag is great for a person who wants to start out with a relatively nice sleeping bag. It is light, cheap(in a good way), and warm for the degree it recommends. It is nice and roomy(i can bend my knees fully!). It is only 550 fill, which is fine by me. I am 5'6'' and still growing. I would recommend this bag for any one starting. It is super light on the trail and fits well into my pack. (my pack is tiny) Since it is down, it can definitely be packed down more than 9 by 17 inches. The sack it comes in is nice and tough, good for the backcountry. It is to warm in 55 degree conditions and over, still fine by me. Over all this is definitely the bag to get when you start out.

    Warm Sleeping Bag!!

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

    I used this on one car camping trip. Temperature went down to 39-40 degrees. This bag was super toasty.

    I will say that the zipper (right sided) gets stuck occasionally, which is kind of annoying.

    Toasty Cocoon

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

    I was trying to decide between a synthetic or a down sleeping bag and decided to spend the extra money and go w/ down. And I am glad I did! I took this on a camping trip (where I had to fly) and it packed up well in my carry on luggage. It's light, can be stuffed sacked, or rolled up pretty neatly. Camped at Zion and although it didn't get anywhere near 20 degrees, this sleeping bag kept me so warm, I got hot! I ended up sleeping on top of the bag and it was surprisingly super soft and comfy to sleep on. Can't wait to use it in colder weather and test if I still get hot! :)

    Comfortable Bag

      This sleeping bag is well designed and performs exactly as advertised. Temperature rating is accurate. I am 5'11" and bought the long because I read somewhere else the regular might feel too short. Long feels just right. I also read that polyester material of this bag is not as strong as nylon (esp. more expensive ripstop nylon), but it feel to me to be strong enough. Unless you plan to expose this bag to sharp objects it should be just fine. Bag color is nice too.

      Can the North Face Furnace Sleeping Bag: 20 Degree Down long/left be zipped together with another North Face Furnace but with the regular/right zip?