Northern Warmth Mummy Down Sleeping Bag

A tapered down mummy bag for cold British nights. Choose the fill weight for the conditions you actually camp in — the grams are printed on every listing, because that is the figure that decides how warm you are.

Choosing the fill weight

We have not had this bag laboratory-tested, so what follows is our own guidance rather than a tested rating. More down means more warmth and more weight, in that order.

• 400 g — summer nights, festivals, hut and hostel use.
• 600 g — British spring and autumn camping, the option most people end up with.
• 800 g — late autumn, exposed pitches, anyone who sleeps cold.
• 1000–1200 g — winter and frost, car camping where the packed size matters less.

Read the full fill guide.

It opens out flat

Unzipped all the way round, the bag lies flat as a quilt or a ground mat — useful in a van, in an awning, or as something warm to put a child on. It packs back into the compression sack that comes with it.

Care

Store the bag loose, never compressed. Wash rarely, with a down-specific detergent on a cold gentle cycle, then tumble dry low with two clean tennis balls until the clusters separate completely — expect two or three cycles. Do not dry clean.