When determining what sleeping bag to purchase ... a two-way locking no-snag zipper and a small pocket for electronics. The shell fabric is made of soft but durable nylon taffeta.

Offering "warmth, versatility and thoughtful design features," this sleeping bag lets you "customize ... extras like a glow-in-dark zipper and internal stash pocket. (Men's: $325, £256, REI.

Robens Icefall Pro 300 sleeping bag review: verdict Great quality, instant cocooning warmth and a well-placed zip make the Robens ... and we also think it sits at a pocket-friendly price point ...

I liked the extra design features the Ascent boasts, such as a roomy phone pocket ... sleeping bags too roomy or draughty may find this smaller design fits them perfectly. A wear-it-your-way zip ...