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Big Agnes Summit Park 15

rated 5.0 of 5 stars
photo: Big Agnes Summit Park 15 3-season down sleeping bag

This is the perfect year-round bag! It packs relatively small, is warm and comfy, and doesn't break the bank. If you're a big person who likes to have room to move around when you sleep, then look no further.


  • Big enough for larger people
  • Comfortable over a very wide temperature range
  • Packs down to a nice size for a large bag
  • Roomy enough for side-sleepers.


  • Zippers snag easily

This is my third Big Agnes bag.  I have a Whiskey Park, which is a 0-degree rated synthetic bag best suited to car camping. It's a great bag for winter, but is huge when packed. I previously owned a Buffalo Park, which is a 40-degree summer bag.  It was great for warmer camping, but the temperature had to be pretty comfy for it to be useful.

I bought the Summit Park as a jack-of-all-trades to replace the other bags on motorcycle trips where space was tight and occasional temperatures below freezing were encountered. It's more than lived up to my expectations. 

It packs to approximately the same size as my old 40-degree bag, and keeps me much more comfortable. The Big Agnes Park series was designed for larger guys, of which I am one. I come in at 6'2" and 270 lbs., and the Summit Park gives me more than enough room to move around and roll over if I need to. 

I use an Exped SynMat 9 Pump DLX pad, which goes into a sleeve that's built into the bag. There's no insulation on the bottom of the bag, the idea being that a pad will provide the warmth. A bonus is that you never slip off of the pad in the middle of the night. It works beautifully! I tend to be a restless sleeper, and being able to roll around from side to side without ending up on the cold tent floor is a great feature. 

We camp after long days in the saddle of our motorcycles, as well as long days of hiking, and the Big Agnes system really makes a huge difference in the quality of sleep that we get. 

The zipper has a tendency to snag more than I like, but careful use prevents this. The Summit Park (as with most Big Agnes bags) can be ordered with either a right or left zipper, allowing a bag with the opposite to be zipped together. My wife and I love this feature!! Entry and exit is very easy with the bags zipped together, and the snagging issue seems to be eased somewhat in this configuration. 

We've used our bags in all weather conditions, from 65-degree nights at low elevation, to below-freezing in Yosemite. There have been 5 or 6 nights of good, hard rain, and the bag showed no signs of soaking up any moisture.

When stuffed, the Summit Park fits into a medium stuff sack, and compression straps will get it down to the size of a pair of running shoes. Not too bad, considering its opened size. It fluffs up very quickly when unpacked, and so far I've had no cold spots or bunching of the insulation. 

This is my second year with the bag, and I could not be happier. I've spent somewhere between 75-100 nights in it, and it still looks and works like new. I'm considering buying another one and stashing it for the day that I finally wear this one out. That looks to be a long way off. 

I bought this from, and paid about 60% of the list price for a color that was one year out of date.  I can live with not being fashionable for that kind of savings.  :)

Source: bought it new
Price Paid: $149

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Price MSRP: $299.95
Historic Range: $247.45-$329.95
Reviewers Paid: $149.00
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