Free 2-Day Shipping on orders over $50*
Memorial Day SaleMemorial Day Sale
Detail Pics

Description

Baffling warmth in a package fit for a king.

For comfortable slumber during your spring-and-summer backpacking trips, look no further than the Big Agnes Mystic SL Sleeping Bag. A unique, lightweight design and 800-fill goose down insulation rated to 15F keep you toasty from dusk until dawn. Big Agnes eliminated insulation on the underside of this bag (where it would compress and lose effectiveness) in favor of a sleeping pad sleeve—a construction that makes the Mystic more packable and means that you can't roll off your padding at night.
  • Big Agnes sleeping bags leave out the bottom insulation both to save weight and because down compressed by your body weight loses most of its insulating value
  • Note: bag requires a 20-inch-wide rectangular sleeping pad to be fully insulated (sleeping pad available separately)
  • Feathery-light Pertex shell fabric uses a water-resistant surface treatment to keep goose down insulation protected from frost and condensation
  • Insotect Flow construction uses vertical chambers with interior gates that control movement of down so as to equalize insulation distribution for uniform warmth throughout the bag
  • No-draft zipper tube, collar seals, and wedge between the bag and pad virtually eliminate areas of cold-air leak
  • Interior fabric loops attach to a sleeping bag liner that provides an additional measure of warmth
  • Left- and right-zip Big Agnes bags with the same zipper size can be mated to create one large sleeping space for couples
  • Built-in pillow pocket holds a fleece or Big Agnes pillow

Share your thoughts

What do you think of the

Big Agnes Mystic SL Sleeping Bag: 15 Degree Down

? Share a...

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(optional)

Invalid filetype.

Save

Here's what others have to say...

5 5

rshp315626

Member since 

This is my second BA bag. I use a "Hog Park" poly bag when camping off the motorcycle but turn to the Mystic SL when Backpacking or when the forecast is 40 degrees or below.

I am a big guy at 6'4" and 245# so I really appreciate the generous cut of the Mystic SL as it allows me to sleep comfortably even on my side. I tend to be a cold sleeper and generally want a bag rated 15 degrees or so higher than the expected low for the night. I have used this bag into the mid 20's and was very comfortable wearing a silk base layer.

A couple comments: The secret to any BA bag is to use the warmest pad available. I am using the BA Insulated Q-Core pad with the Mystic SL--I use an Exped DownMat 9 with my poly bag--and think they are both great products.

Overall the quality of construction, the materials used and the usability of this bag is very satisfactory. At a little less than 2.5 pounds it packs small and is a joy to carry. I am well pleased with the purchase and as always, Backcountry's customer service is second to none.

I am a big fan of waking up warm, comfortable and well rested. This bag gets me there!

5 5

nha5767818

Member since 
  • Gender: Male
  • Familiarity: I've put it through the wringer

The bag is great you never come off the pad and your pillow stays in place too. This is the best sleeping bag I've ever had.

Can I use it witout the sleeping pad? I...

ask5697474

Member since 
Posted on

Can I use it witout the sleeping pad? I would have a 3 inch warm mattress under the sleeping bag..

Pat Palmer

Member since 
Responded on

This bag only has a sleeve for you to insert a sleeping pad into. Since it has no insulation underneath, you REALLY need a sleeping pad to insulate you from the ground.

How big is this bag stuffed and compress...

vup5716654

Member since 
Posted on

How big is this bag stuffed and compressed?

Pictures would be very appreciated.

Thanks!

Brandon Collett

Member since 
Groups:
Responded on

Hey, thanks for the question! The stuff sac size this comes with is 8 x 17.5 inches.

slj100624563

Member since 
Responded on

It gets real small. I usually leave my thermarest neo air in the bag sleeve and get it all into the sleeping bag compartment of my atmos 65 pack.

Does anyone know if the temperature limit...

ang4743432

Member since 
Posted on

Does anyone know if the temperature limit on this bag is a comfort limit or extreme limit? For example - if I use this bag at, say, 30 degrees, will it be excessively warm? Conversely, could it go down to say 5 degrees without me freezing to death?

Gone Fishing

Member since 
Responded on

A sleeping bag's temperature rating identifies the lowest temperature at which a bag will keep the average sleeper warm. Everyone is different and comfort will vary greatly between users. If it is colder than you feel comfortable you can add a liner or sleep in your down. If it is warmer usually opening up the zipper will cool you down enough to be comfortable.

The description says it requires a twenty...

jem4274840

Member since 
Posted on

The description says it requires a twenty inch sleeping pad, but will it accommodate a twenty five inch pad as well?

Kirk Haskell

Member since 
Groups:
Best Answer Responded on

This bag does require a 20" pad you can not use a 25" in this bag

4 5

Arthur Debowski

Member since 
Groups:

This was my first BA bag and I was just jumping in feet first into the no insulation on the bottom/ pad is the bottom system. After using it a couple of nights I see the merits of the system. It is warm, it is light and packable, and I am always on my pad. I tend to toss and turn a fair amount while sleeping and occasionally would end up cold since I was sleeping next to my pad, this is no longer the case and I am sold on the system. There are times I am not bringing a pad so I tend to stick with some of my traditional pads for those situations (where I will be sleeping on my rope or whatever else is around).

5 5

slj100624563

Member since 

This bag saves me weight and gives me a better range of temperature coverage. The Big Agnes system for holding a sleeping pad is the best way to get a good nights sleep. I highly recommend any of the Big Agnes products.