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I asked Ueli Steck as @fgysin suggested and got the following answer: It is "Sportusal Spray". This is a spray stimulating the blood flow. For more information have a look at the medication here...
Answer
I asked Ueli Steck as @fgysin suggested and got the following answer: It is "Sportusal Spray". This is a spray stimulating the blood flow. For more information have a look at the medication here...