This is incredibly lightweight for a bag with a -5 deg C comfort limit at just 776g (792g with stuffsack). The Lightwave Firelight 450 is made with a lightweight 29 g/m² 15 denier nylon, and this helps to strip away the weight. For insulation you get 450g of 900 fill power down, while most bags have 750 to 800 fill power, which means the Firelight needs less down inside, thus reducing the weight and packed size. Slant wall construction is used to reduce cold spots and the side zip is positioned on the top edge of the side, so that even when opened there are fewer draughts, assuming you haven’t rolled around too much of course. The zip extends almost to the foot, so you can choose to vent your ankle and calf area while keeping your feet tucked inside. The zip itself is a finer size than others and the baffle inside is also smaller, and all this helps to keep the weight down. The shoulder baffle is reasonable but there’s no drawcord on it, so you can’t tighten it down. The hood does have a drawcord, however, although the hood itself isn’t as close-fitting as some designs. The Lightwave Firelight 450 lacks the water-resistant down or the water-resistant shell of some bags here, but what it has is that tiny weight plus a good degree of insulation.
Weight (with stuffsack) 776g (792g)
Length x shoulder width 210x76cm
Packed size 18x30cm
Outer fabric Pertex Quantum
Inner fabric Pertex Quantum
Insulation down, 900 fill power
Construction slant box wall
Comfort 0 deg C
Lower comfort limit -5 deg C
The Lightwave Firelight 450 is a specialist piece of kit and it lacks some features, but if you want to really cut down on your weight then this is ideal if you don’t mind the price tag.
Review by Graham Thompson
Published in Trail magazine June 2014