Some serious thought has gone into the Deuter Exosphere -4. It immediately feels warm and cosy, thanks to the elasticated design, which brings the insulation close to your body and eliminates cold spots. It also has extra insulation around the foot area. This means the bag feels warmer than the temperature ratings might suggest, but a good two-way zip (with decent baffle) makes it easy to ventilate. The hood is excellent and well-cut, pulling in easily and neatly, and the same goes for the shoulder baffle. The lining feels like silk. You also get water-resistant panels at the head and foot where they come into contact with tent condensation, plus an excellent compression sack. Furthermore, it comes in large, regular or women’s fit. And on top of all of that, it’s light! But the zip snags more than others here and it’s at the higher end of the price scale. Also, the regular version of the Deuter Exosphere -4 was only just long enough for my 6ft frame.
Outer fabric 44D nylon Tactel diamond ripstop and 70D nylon diamond ripstop
Inner fabric Deuter Poly-Lite Soft
Insulation Deuter Thermo ProLoft
Minimum comfort temperature rating -4 deg C
Packed size 40x20x64cm; 24x21x67cm compressed
Weight 1380g (bag); 1478g with stuffsack
Made in Vietnam
Stores in the UK 10
The Deuter Exosphere -4 is a great bag, which is warmer than expected, light, compresses well and has a host of well-thought-out features. More expensive than some, but you get what you pay for. It won Trail’s ‘Best in Test’ accolade.
Review by Ben Winston
First published in Trail magazine Spring 2011