Deuter Exosphere -6°C £170

+ Good value, super-snug fit, cosy - Narrow and tight fit, heavy, bulky

Super-stretchy is the best way to describe this synthetic sleeping. It features internal and external elastic chamber seams, which provide 25% expansion and contraction in the bag’s width. Why? So that the bag stretches with you when you toss, turn or shuffle at night, but then when you stay still the insulation is brought close to the body to eliminate cold spots. This bodyhugging sensation is probably rather Marmite-y: you’ll either love it or hate it. Certainly it delivers a tight, narrow fit that some will find super-snug (akin to a baby being swaddled), while others might consider it too constricting. The price is very competitive (we found it for £99 online at Go Outdoors) and provides a decent 0°C comfort rating, thanks to the hefty 870g fill of synthetic insulation. Other features include the use of brushed fleece inserts inside the bag for a soft feel, extra water-repellency at the head and feet via a sturdier Dryzone shell, and Velcro closure to the adjustable neck baffle for a sealed-in feeling around the head. You also get an adjustable hood, fulllength two-way zipper, added insulation in the cosy footbox and a compression sack.

■ Fill 870g of Deuter Thermo ProLoft synthetic insulation

■ Temp rating 0°C comfort,

-6°C comfort limit

■ Weight 1370g (regular)

■ Packed size 33x19cm (regular)

■ Sizes Regular, slimline, long

Verdict

A body-hugging, stretchy bag at an affordable price – but the cut and design won’t suit everyone.