Reactor™ 15 Mummy II Sleeping Bag

Alternate Views

Swipe for more images

Reactor™ 15 Mummy II Sleeping Bag

Details UU9905
Members get free shipping + 0 Greater Rewards points


    • 1. Select Color:
    • 2. Select Size:
    Reviewers rated this product True to Size
    • 3. Select Dimension:
    Reviewers rated this product True to Size

Product Actions

Add to cart options
Add to Wishlist


Style# 1525561


The warmest sleeping bag we make, the Reactor 15 is packed with 41oz of toasty Thermic MX insulation, an Omni-Heat® thermal reflective lining, and several thoughtful design details that work together to help cancel heat loss.

  • Omni-Heat thermal reflective lining traps your body heat while providing breathability
  • Omni-Shield advanced repellency protects you from rain and condensation in the tent
  • Stash pocket
  • Offset quilt construction to avoid cold spots
  • LH/RH zip together
  • 18” x 9” compression sack included
  • Thermix MX™ Insulation
  • Draft tube insulates your zipper to keep out the cold
  • EN T-Comfort: 28 degrees F, -2 degrees C
  • EN T-Limit: 17 degrees F, -8 degrees C
  • EN T-Extreme: -16 degrees F, -27 degrees C
  • Average weight: 56 oz
  • Fill weight: 41 oz (regular), 45 oz (long)
  • Regular fits 6’ person, long fits 6’6” person
  • Imported
  • Style# 1525561

  • Shell: Omni-Shield 100% nylon 30D micro ripstop
  • Lining: Omni-Heat thermal reflective Microtex
Omni-Heat™ Reflective
Thermal Reflective Warmth
Water and Stain Repellent

Technology Videos

Play youtube video about Omni-Heat Reflective (tm)
Omni-Heat™ Reflective
Magic in a littlesilver dot.
Breathable material with little silver dots that reflect body heat.
Play youtube video about Omni-Shield (tm)
Helps you stay clean and dry by resisting absorption of liquids.


Reactor™ 15 Mummy II Sleeping Bag is rated 4.8 out of 5 by 6.
Rated 5 out of 5 by from Just the right amount of warm Many times we use our sleeping bags inside cabins, like we did this past weekend. We used our new Reactor 15 Mummy II bags. I was aftraid I would get too hot with the Omni-Heat inside, but I didn't. I was comfortable all night long. I also like that the bags come in Left Handed (me) and Right Handed (my husband) versions.
Date published: 2014-04-29
Rated 4 out of 5 by from Everything but a good zipper This bag was reasonably warm, but I would recommend wearing some thick socks in the really cold weather. The only major problems I had with it was that the zipper can be very hard to operate at times and it is difficult to stuff back into its travel bag.
Date published: 2014-03-11
Rated 5 out of 5 by from Toasty Nest This sleeping bag is very warm. I haven't tested it out to extremely cold temperatures, so I'm not sure how it would do. I think the coldest it's been while I slept in this was probably around 40 deg F. The sleeping bag has a couple of drawstrings, one inside near where your head would be (which can be a minor annoyance) and one on the outside. The bag packs pretty easily, but I do have some difficulties sometimes getting it to pack all the way in to the bag without having any part of the sleeping bag stick out too much.
Date published: 2013-06-02
Rated 5 out of 5 by from Omni-heat is fantastic I have an older sleeping bag bought in circa 1992, a Coleman mummy bag. It was warm and held up very well. It had a couple holes in it, they were getting bigger and exposed the fill material. It wasn't as warm as I remember. I focused on the Omni-heat feature with Columbia. I went with the coldest bag (Reactor 15) because I get cold easy so I figured with the side by side comparison the Reactor 15 was best for me. Wow, is it warm! I have not tried it out in a cold climate but I did try it out at home when it arrived and it gets real toasty. I frequently have it in my SUV. I work at a fire department and often we have to move to another firehouse due to various reasons. Taking a sleeping bag is a lot simpler than to lug all your other bedding from your home station. So the compact size and warmth is idea for me. I could have gotten away with the Reactor 35--the one I was originally planning to get--but some guys really like to sleep in a cold environment (crank up the AC or they turn down the furnace). Plus I wanted a sleeping bag that can take colder temperatures for a hunting trip or should you get stranded overnight in your vehicle in a blizzard condition. Bottom line, the whole series of the Reactor sleeping bags are the bomb! Just figure out how cold you need your bag to accommodate and that's the one you buy.
Date published: 2013-04-01
Rated 5 out of 5 by from Sweet bag This bag is nice. I slept in it at my house on top of my covers the first night I got it and didn't sweat. Perfect bag for cold weather although the coldest I have been in with it so far has just been in the 30's and it worked great! I would recommend not wearing outerwear while in the bag though, it works best just in shorts or underwear.
Date published: 2013-03-10
Rated 5 out of 5 by from Very warm It didn't get down quite to 15 degrees, but it was close to freezing temperatures. It kept me warm and comfortable all night. Enough room at the feet also, so I didn't feel constricted. The only problem I had was the zipper would get caught. Well worth the money for a backpacking sleeping bag. Very light weight and packs in stuff sack very easily.
Date published: 2012-08-19
  • y_2018, m_9, d_17, h_14
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_6
  • loc_en_US, sid_UU9905, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_columbia

Size & Fit Guide

Size Chart

Shipping & Returns

Shipping & Returns

Shipping Information

Shipping Method Rate Expected Delivery Time
Ground $6.00 3-7 Business Days
2-Day Air $12.00 2-3 Business Days
Overnight $19.00 1-2 Business Days
Free Standard Shipping

Return Policy

Returns are accepted within 60 days of the purchase date online or in-store. Your apparel must be in original and unworn condition, with tags still attached. Footwear returns must also include the original box.

Still Have Questions

See our Customer Service section for more details. Visit Customer Service

Greater Rewards - Join the adventure
free shipping always
earn points & rewards
points for sharing
member only offers