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Item # BGA9D203

Big Agnes Diamond Park 0 Degree Sleeping Bag

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Big Agnes Diamond Park Sleeping Bag Series

By Troy

Enwild Gear Specialist

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A cozy warm option for cold-weather backpacking and camping, the Big Agnes Diamond Park 0 Degree sleeping bag utilizes weather-resistant 600-fill down insulation and has oversized dimensions to accommodate larger sleepers or anyone looking for extra room to sprawl.


A cozy warm option for cold-weather backpacking and camping, the Big Agnes Diamond Park 0 Degree sleeping bag utilizes weather-resistant 600-fill down insulation and has oversized dimensions to accommodate larger sleepers or anyone looking for extra room to sprawl.

The bag is insulated with 600-fill DownTek insulation. Down insulation has long been renowned for its compressible properties and efficiency in delivering an excellent warmth-to-weight ratio. The shortcoming of down has been its susceptibility to the effects of moisture, losing much of its performance qualities when wet or damp. DownTek insulation utilizes nano technology and a proprietary application process to provide water-repellency and both anti-microbial and anti-bacterial protection. A nylon rip-stop shell with a DWR finish further protects the insulation from moisture while providing lightweight durability.

In a traditional sleeping system, the bag lies on top of a sleeping pad. In this configuration, many people find themselves rolling off the pad at night. Plus, the insulation on the bottom of the bag is compressed by the sleeper's weight. Once compressed, the fill loses most of its insulating properties. The Big Agnes System is different, joining the bag and a sleeping pad together (pad sold separately). The pad slides into a sleeve on the bottom side of the bag, supplying insulation to the bottom of the bag while the top 2/3 of the bag is insulated like a traditional sleeping bag. This design provides a secure foundation so you can roll, twist and turn freely during the night without ever rolling off your pad. It also prevents the bag from twisting and engulfing you in an uncomfortable mess.

NOTE: To deliver on its 0 degree rating, the bag must be used with a 25”-wide or 30”-wide sleeping pad (sold separately) with an appropriate R-value. Big Agnes builds a variety of models and other branded pads can also work.

Other performance features found on the bag include baffled construction, a polyester taffeta lining, internal loops for using a bag liner (sold separately), and exterior hanging loops. A fully insulated hood, a no-draft collar, and insulation behind the bag’s dual zippers bolster thermal efficiency. The dual zippers also allow you to effectively vent the bag or unzip it entirely for use as a comforter.

The Big Agnes Diamond Park 0 Degree sleeping bag comes in a single, long length that fits up to 6’ 6”. A storage sack and stuff sack are included.

  • Unique quilt-like construction turns your bag into a backcountry bed plus zip-off option to create a quilt or mummy bag with the Park Series Wedgie (sold separately)
  • Use the top corner hand pockets to wrap the bag around your shoulders like you do with your comforter at home
  • Free Range Hood design gives you the freedom to lift your head while snuggled in the hood
  • Low-profile cordlock lets you un-cinch the hood with one hand
  • Insulated tube along upper hood opening seals out drafts when cinched
  • Pillow Barn keeps your pillow (not included) tucked in tight all night
  • No-draft collar, no-draft wedge, no-draft zipper
  • Rectangular shaped bag
  • Flex Pad Sleeve features stretch construction that accommodates multiple pad widths, and easily connects your bag to your pad (sold separately)
  • Lightweight rip-stop shell for high performance and a soft feel
  • Compartmentalized, horizontal baffled construction prevents down shifting
  • Double zippers allow entry from either side of bag and when unzipped allows top of bag to be used like a comforter
  • Top and bottom zippers allow for maximum venting
  • Two 78” YKK #5 anti-snag zippers for a smooth, quick zip
  • Zipper Garage
  • Park bags mate easily
  • Internal mesh stash pocket for phones and other little ditties
  • Interior fabric loops for sleeping bag liners
  • Exterior loops for hang drying or storage
  • Storage sack and stuff sack included

Technical Specs

Best Use
Backpacking, Camping
Fill Material
600-fill DownTek
Fits To Girth
Fits To Length
6' 6"
Temperature Rating
0 Degrees F
Insulation Type
Item Weight
4 lb, 14 oz
Storage and stuff sack included
Limited Lifetime
Packed Size
9" x 20" (compresses to 11" x 8")
Shell Material
Nylon rip-stop with water-repellent finish
Liner Material
Polyester Taffeta

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