This insulation works so well, not only can snow land on reindeer's backs and not melt, with a little jog they can overheat, even in temperatures down to -40 Celsius.

这种隔热效果非常好，雪不仅会落在驯鹿背上，而且还不会融化，稍微慢跑一下，它们甚至会过热，即使是在低至-40摄氏度的温度下。