Lightwave Firelight 350 sleeping bag 6', 970 fill
$500 obo free shipping conus

used on 1 weekend trip, packs very small, yellow, convenient zipper.

Fill weight: 350 g (size M)
Fill power: 900 EU (970 US) white Polish Goose down

The most important part of a sleeping bag specification as the combination of fill weight and fill power (FP) is what provides the sleeping bag's ability to insulate. 350 g of 900 FP down will fill the same volume as 425 g of 800 FP down or 485 g of 700 FP down.

Comfort rating: 3°C
Lower limit: -2°C

Construction
Baffles: Box wall throughout
Hood: Adjustable cowl
Neck: Simple adjustable baffle
Zip: Full length #5 YKK
Zip baffle: Single
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 350 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).

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

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.

Bags:
Stuff sack: 25 g
Storage bag: 75 g

Comfort rating: 3°C
Lower limit: -2°C

The Firelight 350 is an excellent bag for all uses when you do not expect to be sleeping in temperatures below zero. It is ideal for travelling when one is always going to be indoors, and for trekking during the summer months at altitudes of up to 3000 metres. Please click here for our end-use chart.

In 2005 the European Standard EN 13537 became the official standard for the labelling of sleeping bags in the European Community. The standard is not mandatory.

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 Lower limit The lowest temperature at which a standard adult male is deemed able to have a comfortable night’s sleep.