Lightwave Firelight 550

The Firelight 550 is a high quality, lightweight down sleeping bag that is ideal for use in temperatures down to -9°C. 

 Comfort rating: -3°C

Lower limit:  -9°C

The Firelight 550 is an excellent all-round bag for those who are adventurous, travelling to colder places or trekking at higher altitudes. It is warm enough for summer alpine climbing up to 5000 metres. Its versatility is similar to that of the lighter Firelight 450 model, but more for those who want to err on the side of always being warm rather than risk the chance of the occasional cold night. 

Fill

Fill weight: 550 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.

550 g of 900 FP down will fill the same volume as 615 g of 800 FP down or 700 g of 700 FP down.

Construction

Baffles: Slant box wall on top, box wall on bottom
Hood:  Adjustable cowl
Neck:  Full adjustable baffle
Zip:  Full length #5 YKK
Zip baffle: Double

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. The Firelight 550 has sufficient down fill to warrant more sophisticated features such as a full-length side baffle, double zip baffles and an insulated neck baffle.

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

Suitable for Everest Trail Race, treks in Nepal, Tibet, Bhutan, and other mountain destinations such as the Atlas mountains.