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Men's Ratio™ 15F / -9C (Regular)


http://www.mountainhardwear.com/mens-ratio-15f--9c-regular-OU8531.html OU8531


The right bag for backpackers and campers ready to step up to down. The Ratio15 offers reliable three-season warmth, thanks to the unique Thermo Trap Baffle™. 650-fill Q.Shield™ DOWN retains maximum loft in damp conditions. The soft, luxurious lining is cozy and inviting.
Style# 1541141
product.components.activity: Backpacking / Hiking


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    • Azul
    • Azul
    • 2. Select Size:
      Sizing: True to Size | product.components.fitguide.fit Regular-Sleep Bags |
    • REG
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    • 3. Select Dimension:
    • RH
    • LH

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Features & Specs

  • Weight: - 2 lb. 8 oz. / 1.14 kg. -
  • Reviewers rated this product: - True to Size -
  • Good For: - Backpacking / Hiking -


The right bag for backpackers and campers ready to step up to down. The Ratio15 offers reliable three-season warmth, thanks to the unique Thermo Trap Baffle™. 650-fill Q.Shield™ DOWN retains maximum loft in damp conditions. The soft, luxurious lining is cozy and inviting.


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  • Q.Shield™ DOWN 650-fill down has an advanced treatment applied that resists heat robbing moisture and retains maximum loft in damp conditions
  • Unique Thermo Trap Baffle™ locks down into smaller chambers for less down migration, even loft height and more consistent warmth
  • Comfort mummy cut efficiently maximizes warmth and minimizes weight without constriction
  • Down-filled face gasket comfortably blocks drafts at the hood opening
  • Insulated draft tube with anti-snag panel prevents cold spots along zipper
  • Single-handed drawcords easily adjust hood closure
  • Full length #5 zipper with double sliders for versatile ventilation
  • Durable, lightweight nylon shell with DWR treatment repels water
  • Stuff sack and mesh storage bag included
  • Imported


  • Fabric Body: 30D Nylon Plain Weave (100% Nylon) Insulation: Q.Shield® DOWN 650-fill Lining: 30D Nylon Plain Weave (100% Nylon)
  • Insulation: Q.Shield™ piumino con densità 650 cuin
  • Bag Shell: 30D Plain Weave
  • Bag Fill Type: DOWN


  • Apparel Fit: Regular-Sleep Bags
  • Weight: 2 lb. 8 oz. / 1.14 kg.
  • Bag Shape: Comfort Mummy Cut
  • Bag Loft: 5 in / 14 cm
  • Bag Stuff Size: 8 in / 20 cm
  • EN Rating: T-LIMIT: 12 F / -11C
  • EN Rating: T-COMFORT: 24 F / -4C
  • Bag Fill Weight: 600 g. / 650 g. / 1 lb. 05 oz. / 1 lb. 07 oz.
  • Inside Length Regular: 78 in / 198 cm
  • Inside Length Long: 84 in / 213 cm
  • Hip Girth Regular: 58 in / 147 cm
  • Hip Girth Long: 60 in / 152 cm
  • Foot Girth Regular: 38 in / 97 cm
  • Foot Girth Long: 40 in / 102 cm
  • Shoulder Girth Regular: 62 in / 157 cm
  • Shoulder Girth Long: 64 in / 163 cm


Men's Ratio™ 15 (Regular) is rated 4.9 out of 5 by 19.
Rated 5 out of 5 by from Warm & Comfy This is my fourth Mountain Hardware bag for me and like the others it doesn't disappoint. It is lightweight, compresses well and lofts back up quickly. Can't beat the quality of these sleeping bags.
Date published: 2017-04-26
Rated 5 out of 5 by from I could live in this bag I was looking for a do-it-all sleeping bag for my 3 season outdoor adventures and this bag totally delivers. The weight is great for short backpacking trips, the warmth is great for 3 season camping, the quality/comfort are just what you would hope to see from a product at this price point, and I couldn't be happier.
Date published: 2017-04-21
Rated 5 out of 5 by from Good stuff I have used this bag several times now, mostly in wet or damp conditions. It has kept me warm in spite of several days of rain and snow in Yellowstone, and a couple of damp days in the Alaska Range.I'm not sure if it's warm down to 15 Degrees F, but it definitely kept me warm in conditions that would have been too much for a normal down bag. The fit are feel are great, it compresses really small, and there are no signs of wear after 10 or so nights in it.
Date published: 2017-02-23
Rated 5 out of 5 by from Great Bag for Range of Weather I have used this bag for about 7 months now. It is a very warm and very compressible bag. Using a compression sack, it fit nicely into the bottom compartment of my day pack (38L). Recently I used it camping in Colorado. It got cold that night and rained the entire time. Due to 3 people being in a 2 person tent, my bag got wet where the footprint didn't cover. Didn't even notice the bag was wet during the night and the down did not lose it's loft as a result. The Q.shield works! Bottom line, I would recommend this product as a great multi-season bag!
Date published: 2016-09-06
Rated 4 out of 5 by from Ratio 15 RH After years of backpacking, rafting, and climbing trips I recently purchased a Ratio 15 degree bag to replace an old 30 degree bag that has become all but a glorified blanket. I received the bag, and immediately took it out on a summer backpacking trip to the San Juans. Prior to purchasing, I did much research to find a good low-temperature down bag, and the Ratio was the best I found. The Ratio performed exactly as I'd hoped. Though lacking the features of more complex bags (neck baffles, multiple pockets, ect...), the Ratio kept me plenty warm near treeline even amid a long, cool summer rain while remaining light and packable. Though the included stuff sack is rather large, the use of a compression sack allows the bag to compress much more, making it very space efficient. I am 5'7" and 155lbs, and found the back very roomy, with plenty of space to move my body around and ample room for a pillow in the hood. For smaller persons like myself, the bag feels like more of a hybrid mummy/rectangle due to the extra volume. All in all, I am extremely satisfied with the Ratio. While not the most outstanding in any category compared to higher-fill down bags, it's weight, warmth, and compression (with compression sack) is the best available for the price, and should serve all but the very dedicated ultra-light or deep-winter adventurer admirably.
Date published: 2016-08-25
Rated 5 out of 5 by from Great lightweight sleeping bag I purchased this sleeping bag before heading on a hiking trip in Iceland during their cool season. It packed down small with the compression bag and kept me comfortably warm at night. Since then, I have used it on hikes around where I live (~8500ft Colorado mountains) on cool nights and it has proved to be a solid choice for above 0* temps.
Date published: 2016-08-23
Rated 5 out of 5 by from Great 3 season bag I recently circled Mt. St Helen's and this bag preformed perfect. I was more than warm on the crisp night. Not only was it warm but comfortable. After walking for 14 miles to crawl into something that is comfortable is priceless. My only ask would be for some kind of a strap to keep from sliding off the mattress.
Date published: 2016-07-28
Rated 5 out of 5 by from Great Sleeping Bag Been using this bag for two years now and really love it. I'm not a huge fan of mummy bags, but for thermal and technical reasons it's needed. The cut of this bag is actually really good, I don't find it constrictive at all. So very happy with it in that way! The hood is quite comfortable and the baffle along the zipper definitely helps keep the cold out. There seems to be a decent amount of down in the foot box, so my feet stay pretty warm. There is a minor bit of colour discolouration where my head has been directly in contact with the hood (sweat and/or bug spray I'm guessing). I usually take a liner along to help keep the bag clean internally. The DWR and water repellency has been good and we've camped in a few places with a lot of moisture in the air and some downpours and the damp feeling on the surface hasn't seemed to leach into the bag in any noticeable way. I've used it in a tent and OR Molecule bivy bag. The bivy got quite a lot of condensation in it (high moisture outside didn't help) and the shell of the sleeping bag started to wet through where it touched the top of the bivy (see pic), however it dried out pretty quickly after it was removed from the bivy. I'm definitely glad I got a bag with dry down. Used it in a quinzhee (snow cave) with a Thermarest All Season at -18C and it did pretty well. I wore a base layer with clothes and put a down jacket over my feet to block wind at the door. Overall I would buy it again! The colour is really nice too.
Date published: 2016-07-07
Rated 5 out of 5 by from Very Versatile Bag This bag was the first step up for me from a generic, rectangular camping bag and I am so glad I picked the Ratio! I've used it a couple times while car camping as well as during backpacking and the Q Shield Down has always retained the warmth I've needed even during some winter months! This spring I was wondering how the Down would hold up to some major morning dew, but though the exterior was somewhat damp, I remained dry and comfortable.I recommended the bag to on of my colleagues who now owns one and would wholeheartedly agree with this review!
Date published: 2016-06-24
Rated 5 out of 5 by from Comfort and Packability Bag is cozy warm in 30 degree temps and not sweltering when the sun starts to warm up your tent. Packs down into a 8L dry bag and fits nicely in the nose of my kayak. Stoke to add this to my arsenal of great outdoor gear.
Date published: 2016-06-08
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