MaxNg, the point is that I have seen a single nylon "K way" having shut down and destroyed the left engine on an Mi17 in the same manner than with this "tea towel" (actually they put that on their head !) .
The MI had landed on a 16000 feet glacier and was disembarking pax and material.
An engineer lost 2 of his finger tips, due to frost, in replacing this engine by a new one.