- Features
- Certified 800+ Fill Power Goose Down - Independently Tested and Certified by International Down and Feather Laboratory in Salt Lake City, Utah. Retested at Fill Time in Santa Rosa to Ensure 800 Fill Power Every Time. If the Down Does Not Meet Our In-House Test, We Send It Back
- EN Tested
- Thermo-Pane Foot Box - Double-Layer Baffle Construction for Increased Warmth in Foot Area
- Lightweight 20d Nylon Shell with Silicon DWR
- Classic Trapezoidal Foot Box - For More Foot Room
- Contoured Zipper
- Down-Filled Draft Tube - Eliminates Cold Leaks Through the Zipper
- "Feely" Draw Cords - Ease Nighttime Cord Fumbling
- Forward Lean Foot Box
- Ground-Level Side Seams - Eliminates Drafts
- Hidden Draft Tube Pocket - Inverts Into Draft Tube and Used to Store Watch or Alarm and Stay Out of Our Face
- Nautilus 6-Baffle Hood - 6 Chambers of Down Around Head for Better Down Control and Fit, Hood Cord is Positioned for Easy Access
- Stretch Tricot Baffles - Provide Ultimate Strength, Durability and Bag Life
- Stuff and Storage Sack Included - Store and Pack Just Like Your Sleeping Bag
- Velcro®-free Face Muff - Keeps the Drawcord and Zipper Away from Your Face
- Zipper Guards - Help Repel Biting Zipper Coils
- Linked Styles
- Style Name:Arroyo Long
- Style Number:2348
- Weight:1 lbs 15 oz / 878.8 g
- Fill weight:13.5 oz / 382.7 g
- Price:$269.00
- Style Name:
- Specs
- Colors:
- Fog (1065)
- Overall Weight:1 lbs 11 oz / 740 g
- Fill Weight:11.05 oz / 313 g
- Size on Hip:57in/145cm
- Size on Foot:43in/109.2cm
- Main Material:100% Nylon Silicone DWR 1.05 oz/yd
- Lining Material:100% Nylon WR 1.4 oz/yd
- Insulation Material:800+ Fill Power Goose Down
- Colors:
Marmot Tech Manual
If you are a tech geek and want to know everything about our current technologies, click here to download our tech manual.
800 Fill Down

Certified 800+ Fill Goose Down bags are constructed with the following features:
- Nautilus Hood: the same construction as our 8000m jacket hood, a 3D hood that
wraps around your head and reduces heat loss. - Hood Muff: creates a warm down gasket around your face, keeping the drawcord
away from the face. - Stretch Tricot Baffles: allow the bag to be stuffed and unstuffed without tearing the baffle material.
- Trapezoid Foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.
- Down Fill Oversized Draft Tube: eliminates cold spots
- Zipper guard: keeps the draft tube fabric from getting caught in the zipper
- Ground Level Seams: top layer wraps fully around the body creating a warm layer of down.

Down
From the beginning, down has been Marmot’s foremost insulator. No synthetic surpasses the lightweight, compactability and longevity of down.

Marmot Down DNA:
Down is in our DNA. Marmot was founded in 1974 as a manufacturer and seller of premium quality down jackets, vests and sleeping bags. To this day we only use the finest quality certified goose down for our down insulated outdoor products. Mountaineers and outdoor enthusiasts worldwide rely on Marmot down gear for warmth, comfort, and sometimes survival.
Marmot Down Quality:
Down quality is determined by fill power and durability which is dependent upon the age/maturity of the bird and the processing of the down. The best down comes from larger, more mature birds and goose down is better than duck down (when age/maturity are equal). More mature goose down has larger filament clusters than less mature goose down. These clusters, when grouped, provide many more trapped air pockets and therefore provide better insulation. To maximize the effectiveness of the down clusters, the proper processing of the down (sorting, washing & drying) is required to open them up.
Higher fill power means higher loft, better insulation, lighter weight, and greater durability. We test all of our down for content, cleanliness, species, and fill power. We guarantee minimum fill power for all of our down clothing and sleeping bags. That means, for example, that our 800 fill sleeping bags are guaranteed to have at minimum 800 fill power. We don’t believe in + or – variation when it comes to comfort.
Down Origins:
Down is the light, fluffy undercoating at the base of the feathers of waterfowl. Down is a multi-dimensional structure that insulates by creating pockets of still air that retain body heat. Down is highly breathable and exceptionally comfortable. Pound for pound, high quality down is the most efficient natural insulator there is.
Geese are raised primarily for food and the down that is derived from them is a by-product of the food industry. Geese are raised on large and small farms and roam free outside on these farms. This is their natural environment. They are not raised indoors in controlled conditions. Geese are grain fed and also have access to local plant life.
Geese are generally harvested after 4-9 months for food. Some female geese are kept for breeding stock and are harvested between 1-2 years. These are the geese called the “mother birds” that provide the best, most mature down. After the geese have been harvested for food, the down and feathers are removed, washed, dried and then sorted by separating the down and small feathers from the larger, heavier feathers. These processing methods determine the final quality and fill power of the down. Marmot currently buys down primarily from Russia, Poland & China.
Marmot Guaranteed For Life:
Since 1974 we’ve guaranteed every product we’ve made for the life of the product. We believe the best thing for everyone and the environment is to make products that last.
Have a closer look - download the Marmot down desktop and keep your computer warm.

EN Tested
How do I read the EN information?
Basically the EN graphic shows a temperature range:
| Comfort Limit | The first number is based on a standard woman having a comfortable nights sleep |
| Lower Limit | The next number is based on a standard man at the lowest temp to have a comfortable nights sleep |
| Extreme Rating | The last number is a survival rating for a standard woman |
For example, the rating on our Pinnacle 15º Sleeping Bag shows:
| Comfort Limit | 22.2 degrees |
| Lower Limit | 10 degrees |
| Extreme Rating | Minus 24.7 degrees |
In this example, if a woman who sleeps cold is planning a trip with expected lows between 15 and 25 degrees, she could definitely use the Pinnacle 15 bag. But she may instead consider buying a zero degree bag to sleep more comfortably at the lower temperatures.
Testing Center
Marmot began as a sleeping bag company and we continue to pioneer performance, value and insulation standards in the outdoor industry. All Marmot sleeping bags are EN tested to ensure quality and performance. During the development process, we send all samples to the Thelma Testing Center in Norway. We continually use the Thelma Center to achieve continuity in our results.
What is the EN 13537 test? EN, short for European Norm, is a government test for sleeping bags.

How is the EN test conducted? First let’s be clear that it is challenging to test temp ratings because there are so many variables. Every person will sleep differently in the same bag. Choices like clothing, sleeping pad, tent or no tent, eating and drinking before bed can all affect one’s sleeping experience. For the EN test, a copper mannequin named Charlie is fitted with 20 sensors and a clothing layer (top, bottom, and socks) that provide a consistent thermal value. The mannequin is placed in the sleeping bag and put onto a wood platform roughly 12mm thick. The board is held above the floor with some support which allows air circulation under the board. The board is covered with a mattress that has a consistent thermal value then placed in a cold room. A mathematical formula is used to measure the data received from the sensors based on human modeling.
Why is there an EN Test hangtag on Marmot bags? Marmot sleeping bags sold in Europe require this testing and hangtag. We include this hangtag on all of our bags, as we believe it is the most reliable and accurate measure of the performance of a sleeping bag currently available.
How does EN testing differ from other methods and is it better? When Marmot first started testing bags, especially when we used Gore-Tex® fabric, our designers would go into meat lockers and sleep over night. Once they were able to sleep through the night they looked at the amount of fill to determine the temp range. Nowadays it is a bit more scientific. The testing method used in the US is very similar to the EN test. They use a copper mannequin, but the clothing, pad, and math formula are different. Again we feel the EN test is the most reliable and accurate measure of the performance of a sleeping bag currently available.
Has the feedback from the EN testing improved the designs of Marmot bags? Yes it has. The vast majority of our bags have tested to our current temp ratings. In some cases, the tests showed our bags were actually warmer than the rating we gave it. In another instance, there was a spot that showed room for improvement which led to more efficient baffle construction. With our baseline testing started in 2004, we can now measure improvement over time through new fabrics, insulation, and construction techniques.
Will the EN test become an industry wide standard? That is unknown. Currently our industry can’t agree on how the testing should be done because of all the variables. The European government has stepped in and taken control of standardized testing. For the meantime, Marmot will continue to test with the EN standard.
Marmot rating vs. EN rating?
Marmot’s assigned temperatures are comparable
to the EN lower limit rating.
During Marmot’s development process we send
all samples to the Thelma Testing Center in Norway.
Continually using the Thelma Center allows us to achieve continuity in our results.
Buyer’s Guide Outside 2006 Arroyo
Look No Further
If you’ve lusted after a high-end, ultralight three-season sack but balked at the price, stop hemming and hawing and buy the Arroyo. It weighs just a zipper fob over a pound and a half, thanks to 800-fill down, and delivers conservative warmth with a comfortable, full-zip design. A nautilus-type hood clamps snugly on the head, sealing in heat with a strategically placed drawcord that doesn’t hang in your face. On wet Northwest nights, the ripstop shell shook off moisture nicely – and dried quickly. Bonus: The internal watch pocket has a pull cord for easy access in the night.
Curly's Clips - Caring for Marmot Sleeping Bags
Marmot's own Curly Cervone and Brian Rashap demonstrate how to properly care for you Marmot sleeping bag.
Curly's Clips - EN Testing
Marmot's own Curly Cervone and Randy Verniers explain EN Testing on sleeping bags and how it can help you as you shop for the perfect bag in this edition of Curly's Clips.
Curly's Clips - Marmot Down
Marmot's own Curly Cervone and Randy Verniers explain why Marmot Down is the best on the market.
Curly's Clips - Marmot Down vs Synthetic Insulation
Marmot's own Curly Cervone and Randy Verniers discuss the differences between down and synthetic insulation, explaining how each works and identifying when you may want to choose one over the other.
Size Chart
| 4'11"-5'2" | 5'2"-5'6" | 5'6"-5'10" | 5'10"-6'2" | 6'2"-6'6" | |
| 90-110 lbs | XS | S | |||
| 110-135 lbs | XS | S | M | ||
| 135-160 lbs | S-M | M | M-L | ||
| 160-195 lbs | M-L | L | L-XL | ||
| 195-230 lbs | L | L-XL | XL-XXL | ||
| 230-265 lbs | XL-XXL | XXL-XXXL |
Sizing by Body Measurements
| XS | S | M | L | XL | XXL | XXXL | |
| Parkas/Jackets/Sweaters/Tops (Unisex) | |||||||
| Chest | 33-35 | 36-38 | 39-41 | 42-45 | 46-49 | 50-53 | 54-57 |
| Neck | 13.5-14 | 14.5-15 | 15.5-16 | 16.5-17 | 17.5-18 | 18.5-19 | 19.5-20 |
| Sleeve | 30-31 | 32-33 | 34-35 | 35-36 | 36-37 | 37-38 | 37-38 |
| Pants/Bibs (Unisex) | |||||||
| Waist | 26-28 | 28-30 | 31-33 | 34-36 | 37-39 | 40-42 | 44 |
| Hip | 36-38 | 38-40 | 40-42 | 43-45 | 46-48 | 50-52 | 56 |
| Inseam (reg) | 28 | 29.5 | 31 | 32.5 | 33 | 33.5 | 34.5 |
| Inseam (short) | 26 | 27.5 | 29 | 30.5 | 31 | 31.5 | 32.5 |
| Inseam (long) | 30 | 31.5 | 33 | 34.5 | 35 | 35.5 | 36.5 |
| Gloves (Unisex) | |||||||
| Girth | 6.5-7 | 7-7.5 | 8-8.5 | 9-9.5 | 10-10.5 | ||
| Parkas/Jackets/Sweaters/Tops (Women's) | |||||||
| Size | 4-6 | 6-8 | 8-10 | 12-14 | 14-16 | ||
| Bust | 30-32 | 32-34 | 35-37 | 38-40 | 41-43 | ||
| Sleeve | 29-30 | 30-31 | 32-33 | 34-35 | 36-37 | ||
| Pants/Bibs (Women's) | |||||||
| Size | 4-6 | 6-8 | 8-10 | 12-14 | 14-16 | ||
| Waist | 22-24 | 24-26 | 27-29 | 30-32 | 33-35 | ||
| Hip | 33-35 | 35-37 | 38-40 | 41-43 | 44-46 | ||
| Inseam (reg) | 27.5 | 28.5 | 30 | 31.5 | 32 | ||
| Inseam (short) | 25.5 | 26.5 | 28 | 29.5 | 30 | ||
| Inseam (long) | 29.5 | 30.5 | 32 | 33.5 | 34 | ||
| Gloves (Women's) | |||||||
| Girth | 6-6.5 | 6.5-7 | 7.5-8 | 8.5-9 | |||
Kid's Sizing (boys & girls)
| XS | S | M | L | XL | |
| Age | 4-5 | 6-7 | 8-9 | 10-12 | 13-15 |
| Chest | 24-26 | 26-28 | 28-30 | 30-32 | 32-34 |
| Waist | 19-21 | 21-23 | 23-25 | 25-27 | 27-29 |
| Hip | 24-26 | 26-28 | 28-30 | 30-32 | 32-34 |
| Inseam | 17-18 | 19-20 | 21-22 | 23-25 | 26-28 |
| Sleeve | 22-24 | 24-25 | 25-26 | 26-28 | 28-30 |
| Height (in.) | 36-42 | 42-48 | 48-54 | 54-60 | 60-65 |
| Weight (lbs.) | 35-42 | 42-50 | 50-60 | 70-90 | 90-115 |
Garment Sizing Information
The charts above will help you select the proper size.
If you have questions, please call us.
Care Instructions
Marmot does not recommend dry cleaning for any of our products. Gore-Tex® fabric products, MemBrain® fabric products, down insulated products, and fleece are all machine washable. You should use a commercial front loading machine and follow the care instructions.









Reviews and comments
on 6/1/10.
Does anyone know if this bag can be zipped together with a second, exactly the same model bag?
on 7/8/10.
Yes it can. Buy a left zip and a right zip and you are in business. In fact, I have the long and my wife the regular and they zip together well. The foot box on each bag will remain separate because the zipper does not extend into the foot box. Happy adventures!
on 7/14/10.
I used this bag for round the world by motorcycle travels through the USA, Russia, Mongolia and the EU.
The quality, construction paid off in warmth that was always there for me. After 8 months of daily use I sent it in to be cleaned and checked by Marmot.
Honestly now it is better than ever and ready to go again. Tough as nails.
You won't go wrong with this bag. With a little upper body insulation the temp range is greatly extended.
Think twice about buying a warmer bag. Unless you plan to winter camp this is all you need. Period.
Oh yah, it sheds water like a duck and dries out quick in the morning sun.
Bill
on 9/30/10.
Looking for a bag for winter desert and mountain spring summer. Generally above + 32 dipping down some occassionally. Bag is for bicycle touring/camping with tent. Not a cold sleeper. I've narrowed it down to this(arroyo) or sawtooth as my budget allows. what do you suggest.
on 9/30/10.
Is the a good choice for cycle touring for desert winter and spring summer mountains? Usually 32+, occasionally dipping a bit
on 11/3/10.
Excellent bag.... I appreciate that the weight was correct down to the 1/10th of an ounce. My Regular Length bag is 27oz. on the button. The fit of the bag is perfect for my semi-stocky build. I have room to layer up top to extend the temp. range and shed layers and ventilate as it gets warmer. I used it the first time out down to 20 deg. or slightly below wearing my down top and long underwear. Overall very pleased with the quality of the product.
on 12/17/10.
I bought the Arroyo for three season use with the intent of minimizing weight and bulk. I took it for a test drive in my North Idaho backyard during a cold spell this fall. Temps leveled out at 30 degrees F in my tent. I slept in long underwear, a fleece vest and beanie on a Thermarest NeoAir mattress. No issues. Can't beat the ±2 pound weight and XS stuff size. I'm a 6'2", 51 year old fit male.
on 1/19/11.
Does anyone know if this bag can be zipped together with a women's Angel Fire long bag?
on 1/20/11.
Any of Marmot's right-zip and left-zip bags can be zipped together.
on 1/29/11.
Haven't had a chance to take this bag outside for a spin due to a car accident, but have made good use of it inside our RV when the propane went out one night!! Kept me toasty warm, without any additional layers, and the temps dipped into the low 30s that night. This is my 3rd bag from Marmot, and I love all 3!! Quality is wonderful- Marmot does it the best!
on 7/11/11.
I have used this bag in Afghanistan sleeping outside in the cold and warm months. This bag is highly durable, and kept me warm period. This bag replaced a Moutani Hardware bag that I used twice over in Afghanistan. This bag held up much better compared to the MHW. Highely recomended
on 1/8/12.
Is the hand side of the sleeping bags defined being in the sleeping bag or looking at it?
My boyfriend has one and when he is in it the zip is on the left. Does THAT mean that it has a left zip? Thanks!
on 5/31/12.
The hand side is defined as being inside the sleeping bag. You are correct about your boyfriend's bag being a LZ.
on 6/5/12.
What is the packed size of this bag?
on 6/11/12.
The stuff size is 7"x14".
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