Lightwave Firelight 450 Down Sleeping Bag

-5°C Comfort Limit (EN13537:2012), 450g of 970+ Fill Power Down (US Method)
Weighs 750g (Regular bag)
Code: SS16125
  • Now £474.99
  • (FREE Delivery on orders over £15)
+ In Stock Now | Usually dispatched within 24 hours

Lightwave's Firelight sleeping bags offer amazing warmth for weight, there's no mystery though, they use the very best quality ethically sourced down in a box wall constructed bag.

Lightwave says:

The Firelight 450 is a high quality, lightweight down sleeping bag that is ideal for use in temperatures down to just below 0°C. Manufactured wholly in Poland, the Firelight 450 is filled with the famed Polish white Goose down that is 100% ethically recovered. The down has a fill-power of 900 cubic inches as measured by the EU norm (and is equivalent to 970 cubic inches using the US standard).

The Firelight 450 has a full length zip that lies on the top of the bag. The zip is protected by a single baffle. There is a neck collar that can be adjusted to close completely around the neck to provide a complete seal.

The Firelight 450 comes in three sizes and is supplied with a compact stuff sack and a large storage bag.

Typical use: The Firelight 450 is an excellent all-round bag. It has enough down fill to be useful for lightweight summer alpine climbing or mountain trekking at altitudes of up to 4000 metres. It is also sufficiently warm for use in spring/autumn, and possibly winter, camping at lower altitudes. We believe this bag to be the most versatile of the range.

Both the quality of construction and the quality of down in Lightwave's Firelight range of sleeping bags ensure that these bags achieve superior ratings when tested to the European EN 13537 standard.

Aside from this obvious quality we like some of the design features, for example the full length zip is on the top of the bag rather than the side - this seems easier to use somehow - when testing a Firelight 450 I could find the zipper much more quickly, and because it starts at the top of the bag I was less likely to turn over leaving it underneath me.

Another curious point was the lack of zip snag, every bag I have ever used snagged at some point, but the Firelight never did. I could quite work this out - but I note the zip is a smaller gauge than usual - which could be it.

Buy these bags and you are buying quality.

- Reviewed by Ultralight Outdoor Gear

Read reviews here:
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


The construction describes how the down is held in place (otherwise all the down would fall to the bottom) and what features are incorporated to maximise heat retention or, conversely, regulate your temperature. A bag as light as the Firelight 450 does not need to have sophisticated features as there simply isn't enough down for it to be expected to perform in very cold temperatures (although it is certainly better than having nothing).

  • Baffles: Box wall throughout
  • Hood: Adjustable cowl
  • Neck: Simple adjustable baffle
  • Zip: Full length #5 YKK
  • Zip baffle: Single


Lightweight fabrics allow the down to loft and reduce the weight of the bag. Although there are lighter-weight versions of the Pertex Quantum fabric we are using, they offer a negligible saving in overall weight and, having a lower tear strength, are easier to damage.

  • Shell: 29 g/m² 15 denier nylon (Pertex Quantum)
  • Lining: 29 g/m² 15 denier nylon (Pertex Quantum)

UOG Weights

  • Short bag weighs: 688g
  • Regular bag weighs: 720g
  • Long bag weighs: 808g
  • The total weight does not include the stuff sack or storage bag

Lightwave Specs

  • Left hand zip only
  • Packed size: 35cm x 18cm diameter, 8.9L
  • EN13537 Comfort rating: 0°C;
  • EN13537 Lower Limit rating: -5°C
  • Fill weight: 450g (Regular)
  • Fill power: 900 EU (970 US) white Polish Goose down
  User Height Fill Weight Total Weight Zip Length Internal Width Internal Length


< 5'7"

430g 725g 135cm 80cm 175cm


5'7" - 6'

450g 750g 150cm 80cm 190cm


6' - 6'6"

500g 810g 175cm 80cm 215cm


Although there are four different measurements, the two most useful (and in our experience reasonably accurate) ones are:

  • EN13537 Comfort Rating: Temperature at which a standard adult female can have a comfortable night’s sleep.
  • EN13537 Comfort Rating: The lowest temperature at which a standard adult male is deemed able to have a comfortable night’s sleep.
Be the first to review Lightwave Firelight 450 Down Sleeping Bag. Write a review ›