Nemo - Kayu 15 - Down sleeping bag tested

The down compresses straight where my butt is thus making a cold spot. However, this is to be expected with all sleeping bags if you are a back sleeper. Quite roomy for a mummy bag (I am 175cm). It is very warm together with a liner for the size and weight!

So far tested at 4°C and did not feel cold at all. Had gills open to let the extra heat off.

Edit: Tested it around -14°C together with my base layers, extra pants, a puffy, and the Sea To Summit Extreme liner. Worked like a charm apart from my mattress which gave some heat away. There were some cold spots, the same butt area, and where my knees pressed against the fabric due to me being a side sleeper as well. There was loads of ice on the bag right under my neck due to the moisture we breathe out. Due to this fact, it still did not get cold. I just might be crazy haha.

Just a note, if you have a down or any synthetic vest, to fight the down compressing on your butt, simply wear it other way around through your legs (where your arms usually go). This will improve the cold coming from the butt area when sleeping on the side.