Which Sleeping Bag Size is the best?

Do you think this travel sleeping bag is a good size?

• I am going travelling to Central and South America next year and need a travel sleeping bag. I am looking at getting the Highlander Voyager Ultra Lite Sleeping Bag. Here are some details about it: Season: 1-2 Extreme Temp: +5'C Comfort Temp: +6 to +15'C Weight: 0.86kg Size: 215 x 70 x 50cm Pack Size: 25 x 13cm I will have a 55L rucksack, do you think this sleeping bag will be an good size to carry around?

• Answer:

  I found the following review on Amazon: Which may suggest that this bag although light is not suitable for outdoor use in anything other than hot conditions. Small and lite - but a bit too small and a bit too lite!, 14 Aug 2009 By Ash (UK) - I bought this for Glastonbury - I wanted a tiny sleeping bag that would take up as little space as possible. And it certainly achieves that - the bagged product is remarkably tiny. However, when you're in the bag and its all zipped up its extremely difficult to move around - I like to sleep in the 'running man' position, which is nearly impossible in this thing as it tapers so much towards the legs that the only viable option is to sleep on your back. I should point out that I am a stocky 5ft 9 - about average size. Its also not that great at keeping you warm - I was camping just last weekend (August!) and, whilst it was a pretty chilly evening, the sleeping bag really didn't keep me very warm at all. I realise you trade off bulk for warmth, but at this price I was expecting space age materials to be keeping me toasty. Not so. In all then, fine for a festival sleeping bag, but not ideal beyond summer. And if its a typical British summer - expect to be cold!!