Western Mountaineering FlyLite Down Sleeping Bag

2°C Comfort Limit, 217g of 850+ Fill Power Down (US Method)
Weighs 408g (excluding stuff sack)
Code: SS21608
  • Now £369.99
  • (FREE Delivery on orders over £15)
Item out of Stock | Usually dispatched within 24 hours

We're working out what we think - we'll add our view here!

Western Mountaineering says:

At just 14 ounces, this bag is setting a new standard as the lightest weight hooded sleeping bag in the world with baffle chamber construction. We have combined the finest materials and feature set including the worlds finest goose down, a balanced 10-denier fabric, a half-length #3 coil zipper with insulated draft tube, and an insulated top collar.

Compressing down to almost the size of a standard water bottle, the Flylite is a perfect choice for fast packers, adventure racing enthusiasts, bikepackers or anyone that is looking for the lightest possible bag that they can still get a full night’s sleep in.

We're working out what we think about Western Mountaineering's FlyLite Down Sleeping Bag, we'll add our comments here in due course.

- Reviewed by Ultralight Outdoor Gear

Help and advice: Choosing a sleeping bag advice
  EN 13537 rating for sleeping bags explained
  Sleeping bag shape and sizes advice
  Sleeping Bag features Page 1
  Sleepin bag features page 2
  All about down filling in sleeping bags
  • 10 denier nylon shell fabric and lining
  • Lightweight #3 coil zipper (half length)
  • No sewn-through seams = no cold spots
  • Insulated draft tube
  • Fully baffled construction
  • Insulated top collar
  • Amazingly light and compressible


  • Length: 180cm / 6"
  • Weight: 408g (excludes storage bags)
  • Fill weight: 217g
  • Loft: 9.5cm
  • Inside Girth: 150/130/99cm
  • Packed size: 13 x 25cm

Rating & Materials

  • Rating: 2°C *
  • Shell fabric: 10 denier Liteloft balanced weave nylon w/C-0 DWR
  • Lining: 10 denier Liteloft balanced weave, soft and breathable nylon
  • Fill: 217g (regular bag) Hypoallergenic 850+ fill power goose down
  • Zip: YKK #3 coil zipper (30" length) w/ locking reversible slider

* Western Mountaineering state: 'We independently verify own temperature ratings through our own testing, customer feedback and design knowledge. Most of the items in our catalog we have been making for years, which means we have lots of prior knowledge from everyday consumers on what ratings are accurate. We have also EN tested our bags. In every case the EN rating is lower than our posted rating. This means our ratings are more conservative. We do this to ensure that almost everyone will be happy in our bags at the temperature we publish.'

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