Sierra Designs

£335

875g

lightweight, comforter design, foot vent, 2 lengths

expensive

Fill: 800fp DriDown

Shell: 15D nylon ripstop

Construction: box wall

Zip: none

Length: regular 198cm, long 213cm Rating: comfort -3C, comfort limit -10C sierradesigns.com

Unusually, this bag has no zip but still opens wide at the top. That’s due to a wraparound comforter that runs across the chest. There’s a big overlap between the end of the comforter and the edge of the bag and so far I’ve had no problems with draughts. With no zip to undo, flinging open the bag for ventilation or to get out is easy.

The top can be folded down too. Under the bag there’s an uninsulated sleeping mat sleeve. It runs about a third the length of the bag. Usually I don’t like this, as I can’t turn over with the bag or comfortably sit up. However, I don’t mind it in the Cloud 800 as I can turn over in the wide bag easily and keep it under me. I have also slept in it without inserting a mat inside and it’s stayed under me. The Cloud is a very warm bag for the weight – I reckon the temperature ratings should be accurate – but the ventilation options means it’s okay for summer use.

The Cloud 800 also has a vent for your feet near the foot, so you don’t lose heat when your feet are inside. There’s a good adjustable hood too. The leg area is roomy.

I’m impressed with this design. It’s effective and comfortable. The Cloud 800 is very light too. It is expensive but the design is unique, and the down fill is high-quality.