Micro Series

This down sleeping bag has serious warmth and an unbelievable packed size

$349.00 – $419.00

Size Guide
What Is This

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. Unisex sleeping bags list the Lower Limit which is the lowest temperature rating that an average male sleeper would be comfortable in. Our women’s sleeping bags list the Comfort Limit, which is the lowest temperature rating at which an average female sleeper should be comfortable. The comfort and lower limit temperature ratings are listed in the features table on the product page.

For example, a unisex sleeping bag that shows a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. Men and women should always sleep in a layer of long underwear and use a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

Here’s a basic categorization of appropriate use, based on rated temperatures:
Summer:   >+35ºF / +3°C
3-Season:   +10 to +35ºF / -15° to 0°C
Winter:   <10ºF / -15°C

A huge variety of factors can impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag as one element in a sleep system which also includes an appropriately insulating sleeping pad and a liner. For instance - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C nights, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner. If you have any questions about which temperature sleeping bag / R-Value sleeping mat you should select, or how to improve your warmth in a sleep system, reach out to us via our contact page any time.


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Versatility, lightweight and a small compact size all in one package. That's what Micro™ down sleeping bags bring to backcountry sleeping comfort. The Micro is a fully featured bag that boasts an incredible warmth-to-weight ratio. Filled with 850+ loft RDS certified ULTRADRY Down™ and using 2D NanoShell™ outer fabric for moisture management, this versatile option is ideal for ultra-lightweight backpacking, travel, hiking, camping, cycle touring and more. A drawcord at the feet cinches the bag in tight to create a regular sleeping bag in cooler temperatures and can be let out to form a camping quilt or blanket in mild temperatures. The hood is adjustable creating many sleeping scenarios in a range of conditions.


Packed Size Comparison

36°F: 4.53 L ≈ Loaf of sliced bread
28°F: 5.01 L ≈ Loaf of sliced bread plus one sandwich


36°F: 1 lb 6 oz ≈ 20oz cup of coffee
28°F: 1 lb 10 oz ≈ Carton of large eggs


36°F: 2.5 Season - take this bag out late spring into early fall, no matter where you are.
28°F: 3 Season - great for fall and all of spring. Perfect for summer when used as a quilt


Slim, there's not a lot of extra room for wiggling


  • 2D NanoShell which gives this bag a high degree of breathability along with a high level of water repellency
  • RDS certified ULTRA-DRY Down 850+ Loft 90% Down Cluster Premium Goose Down
  • Zipper draft tube with anti-snag
  • Hood drawcord with dual adjustment
  • Full-length YKK® #5 side zip
  • Drawcord foot closure
  • Includes lightweight Ultra-Sil™ compression bag and a combined storage cell/laundry bag