The nights on Kilimanjaro can get very cold and hence sleeping bags need to be able to combat the extreme cold temperatures throughout. The best sleeping bag for your Kilimanjaro climb would be rated to -20°F to -30°F that’s down and not synthetic. However, we recommend sleeping bags with a rating of minimum 0°F to -20°F. Obviously, the warmer the better and it is always better to feel too warm than too cold.