In the dining room tent we were at 13 degrees below zero, in the tent at minus 26 degrees, and inside the igloo we slept at -5 degrees. I have to say that it was the best night of my 8 winter expeditions. As you walk from the dining room to the igloo your hands and all your muscles freeze, and the wind blows in your face. However, when entering the igloos we have built in the Base Camp, silence is not heard, and the howl of the wind disappears.
At dawn, the sleeping
bags are completely dry and light travels through walls of more than 20 cm of compacted snow. It is a wonder. But, undoubtedly, one of the greatest discoveries has been the oxygen that is breathed in, the saturation is greater in the igloo than in a tent. Therefore, we rest better.
It's the Luengas technique. Thanks to Aritz and Jagoba for teaching us how to build them here, at 5,000 meters!.