MAMMUT PROTECT DOWN BAG -18C £450

Comfort rated from -10°C to -18°C, this 4-season bag will keep you adventuring all winter. Warmth comes from thick layers of duck down, a substantial hood with collar baffle, and cosy footbox, while extra insulation over the zip effectively prevents the cold and wind from ruining your sleep. A two-way central zipper is excellent too, enabling fine-tuned climate control. VERDICT An exceptionally warm down

bag with excellent ratings for use on cold winter nights.