Lightwave Firelight 650

Comfort rating: -5°C
Lower limit:  -12°C

The Firelight 650 is an excellent all-round bag for those who are trekking in the Himalayas or other mountain ranges over 6000 metres. It is warm enough for alpine climbing up to 4000 metres most of theyear round. Its versatility is similar to that of the lighter Firelight 750 model, but more for those who want to go as light as possible with the risk of having a couple of cold nights. 

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.

Fill

Fill weight: 650 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 725 g of 800 FP down or 825 g of 700 FP down.

Construction

Baffles: Slant box wall on top and bottom
Hood:  Adjustable cowl
Neck:  Full adjustable baffle
Zip:  Full length 
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 650 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. Elisabet used the 650 in the Transatlas race and in the Everest Trail Race and was very happy with it.