Care and Washing - Synthetic Bags

Synthetic Sleeping Bags

Synthetic insulation is the battle tank of the insulation world. It’s not necessarily the lightest option nor always seen as the most glamorous, but it is without question the most reliable, resilient and the most dependable filling in savage and unpredictable conditions. There are literally thousands of synthetic insulation's out there and whilst not all of them are equal they do share one thing in common. Everything from the polymer, to the fibre length and diameter, to the method of construction can be customized and developed according to the requirements of its end use, and we have scoured the globe looking for the best synthetic insulation. Ones that will provide durability, consistency, comfort, weather resistance, and of course outstanding warmth. Synthetic sleeping bags are easier to care for than down bags and provide the best performance in very wet conditions; for many people this makes them the superior option.

Care Tips

Mountain Equipment recommend using a sleeping bag liner whenever convenient: it reduces the number of washes a sleeping bag requires, it increases the warmth of your bag, and makes a handy layer to sleep in if your bag proves too warm and you’d rather use it like a blanket. On weight-critical trips we’ll often leave our liner behind, but for valley or recreational camping they’re an excellent idea.

During a trip air your bag whenever possible, especially if it has got wet. This might just mean laying the bag out once you’ve got the tent up rather than leaving it until you go to bed.

After a trip, leave your bag inside out to allow it to air before storing it.

Small stains and spillages can usually be cleaned up with a damp soapy cloth.


Synthetic sleeping bags should be stored in a cool dry place away from direct light sources. Whenever they are to be stored for long periods they should be kept uncompressed (inside a mesh storage bag or Mountain Equipment Storage Cube is perfect), rather than in a tight stuffsack.

Air them after each use if possible.

Washing and Drying

Synthetic bags are far easier to clean than down bags. But again cleaning should be kept to a minimum.

Again use only pure soap or a specialist cleaning product.

The risk of tearing baffles does not apply to synthetic bags so you can just hang them out to dry in a warm, well aired space.

To Machine Wash a Bag.

Our synthetic bags can be machine washed, though we recommend using a larger commercial machine for this purpose.

Again use only pure soap or a specialist cleaning product.

If using a machine you may have to repeat the rinse cycle to ensure that all the cleaning agent has been washed away.