- Features
- Marmot MemBrain® Waterproof/Breathable Fabric - Marmot MemBrain, Waterproof/Breathable Fabric
- Fully Seam Taped
- Highly Compressible
- Storm Flap
- Specs
- Style Number:2855
- Colors:
- Alert (9321)
- Sizes:
- 1P
- Maximum Weight:15 oz / 0.425 kg
- Minimum Weight:14 oz / 0.397 kg
- Dimensions:8x36x86in / 20.3x91.4x218.4cm
- Packed Size:6 x 9 in / 15.2 x 22.9 cm
- Tent floor Material:40d 100 % Nylon Ripstop 3000mm W/R, F/R
- Tent canopy Material:MemBrain®Strata™ 100% Nylon Ripstop 2.2 oz/yd
- Style Number:
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.
MemBrain® Strata™
Marmot’s own lightweight waterproof / breathable technology. A lamination technology that rates a whopping 20,000mm in waterproof performance and 20,000 gr in breathability.
Requiring neither lining nor 3-layer construction like many similar lamination processes, MemBrain® Strata™ products are by far the lightest, most breathable garments in their categories.
Marmot’s proprietary 2.5 layer MemBrain® Strata uses micro non-organic particles on the inside of the lamination to increase durability and provide a dry touch instead of that clammy feeling you get from some other products.
The back print pattern is carefully designed to achieve the maximum durability and breathability. Abrasion tests rate 4-5 times better than regular MemBrain® (which is why regular MemBrain, as well as all 2-layer laminates require a separate lining).
Compared to 2.5 layer coatings in the market, our 2.5 layer lamination is about 100% more breathable. In addition, laminated stretch fabrics stretch more and have a softer hand than 2.5 layer coated fabrics.
Backcountry October 2009 Alpinist Bivy
For Backup Protection on solo missions, and for traveling as light as possible, Marmot’s Alpinist Bivy is breathable and waterproof insurance against wind, snow, and rain. It packs up small, weighs less than a pound, and while a tent offers more comfort for sleep, this bivouac will keep the weight off your feet. This is a minimalist, form-fitting shelter – not for the claustrophobic.
Tonya and Brad Clement review the Alpinist Bivy
Tonya and Brad Clement, while climbing Andrews Glacier Gorge in Rocky Mountain National Park, CO, review the Marmot Alpinist Bivy.
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 | 28 | 29.5 | 31 | 32.5 | 33 | 33.5 | 34.5 |
| 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 | 27.5 | 28.5 | 30 | 31.5 | 32 | -- | |
| GLOVES (WOMEN'S) | |||||||
| Girth | -- | 6-6.5 | 6.5-7 | 7.5-8 | 8.5-9 | -- | |
Kid's Sizing (boys & girls)
| S | M | L | XL | |
| Size | 6-7 | 8-9 | 10-12 | 14-16 |
| Height (in.) | 45-49 | 50-54 | 55-59 | 60-63 |
| Weight (lbs.) | 44-51 | 52-67 | 68-92 | 93-115 |
| Chest | 26 | 28 | 31 | 34 |
| Waist | 22.5 | 23 | 25 | 27 |
| Hip | 26 | 28 | 31 | 34 |
| Inseam | 18 | 21 | 25 | 28 |
| Sleeve | 22.5 | 24 | 27 | 30 |
| Gloves (age) | 6-7 | 8-9 | 10-12 | 14-16 |
Gament 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 3/3/10.
Listen, I was very excited when I looked at the picture. Avoiding the wet with out the tent! Brilliant. But then I saw the video. I was eager to witness a vicious storm of the century type of situation and two insane alpinists throwing down the bag in the midst of rain pouring on their heads or possibly even snow. Please make this video happen.
on 5/14/10.
Totaly agree!! That might as well have been filmed/reviewed in someones bedroom. Im still considering getting one for an attempt at the Cuillin Ridge Traverse, so if I get one I will give a review based on some use in proper Scotish Highland weather :)
on 3/4/10.
I agree, Jason. For a product known as the "Alpinist Bivy" that video was terrible. I hope that the purpose of this bag is not so you can manage to carry brie on camping trip. A proper review would at least show it being used out from under the protective overhang they were hiding beneath. Sheesh.
on 4/6/10.
Hi,
nice video. Wondering about Alpine Ski Touring here in Canada ??? How does the bag compare to Gore Tex bags in terms of allowing water vapor to penetrate through the material ? I need a dry sleeping bag even after three or four nights in the snow.
Harry
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