Best for three-season use

Plusses: Very comfortable, suits side sleepers, easy to ventilate. 

Minuses: Down is not hydrophobic, quite wide. 

Features: A top-centre zip and longitudinal baffles add distinction to this bag. The hood is 3D mapped, mimicking a jacket hood, and the foot box is sculpted for maximum insulation. There’s an internal chest pocket and the fabric is DWR coated, but the down itself is not hydrophobic.

Fit: For a mummy bag, the Fitz Roy is broader than average in shoulders and hips. It tapers to a shaped foot box, wide enough for generous wiggle room. The hood cinches close and is very cosy. It’s available in three lengths. 

Comfort: It’s a very comfortable bag. I liked the looser fit in warm weather. Slim people might find it too roomy in cold conditions, so try it for size. The long zip is double-ended, extending to just above the ankles, so legs can be ventilated for temperature control.

In use: The zip can be opened halfway for ventilation, and because it’s on top users don’t end up lying on a sweaty mattress. The bag was put to the test when the mercury dipped well below the bag’s limit rating of -1°C. I found the bag sufficient due to the extra warm hood and foot box, and some extra layers. There is no neck muff (a weight-saving measure), which would extend its cold-weather range.

Value: When compared with similarly rated bags, the Fitz Roy is reasonably priced, but I’d prefer hydrophobic down.

Verdict: A versatile bag for summer adventures, into the shoulder seasons and even mild winter conditions. The bag’s width allows layering up on cold nights. It’s great for lightweight tramping.