Super deals: At least 50% off

Synthetic sleeping bags

Buying guide ↓

Guide

Synthetic sleeping bags

Choose the required warmth and length first, then compare freedom of movement and packed size.

Key points

  • Comfort temperature is a better guide than the extreme rating.
  • Extra empty space needs warming, but the bag must not feel tight.
  • Even a warm sleeping bag needs an insulating mat beneath it.
  • Synthetic fill copes better with damp than down but should still stay dry.

How will you sleep on your trip?

UseChooseBear in mind
Trekking with luggageChooseMummy shapeBear in mindCompare warmth and packed size together.
Spacious campsiteChooseRoomier sleeping bagBear in mindMore space to move usually means a larger packed bag.
Shorter body lengthChooseSuitable length and shapeBear in mindExcess empty space also needs warming.

What to look for

QuestionIn briefWhy
How warm?In briefRead the comfort ratingWhyModel names and extreme ratings do not replace comparable temperature information. Allow a margin if you feel cold easily or nights may become colder.
How long?In briefCheck the maker's sizingWhyRecommended body length is more useful than outer length alone. Your feet should not keep pressing firmly against the end.
How to carry it?In briefCheck compressed sizeWhyWarm insulation takes space in a rucksack. Compare weight and packed size for the same length and dry the bag before storing it.

Common questions

Is synthetic fill waterproof?

No. It can cope with moisture better than down, but it does not replace dry shelter or protection from rain entering your sleeping space.

What does extreme temperature mean?

It does not describe a comfortable sleeping range. Do not base your purchase on it; the comfort rating is a better starting point for the nights you expect.

Why am I cold in a warm sleeping bag?

An insufficient mat, damp clothing or excessive empty space can lose warmth. Consider the bag, ground insulation and overnight conditions together.

How should I store it at home?

Dry and loose rather than permanently inside a tight compression sack. This helps preserve the loft of the filling. Follow its care label for washing and drying.

Last updated: November 2026

Categories

No products match these filters.
1 2 3
In the Club: collect FitPoints, unlock codes
To the Club