Started at 05:41 in the morning, first stop at Schaefler to fill flasks - 1L.
Säntis - Fill water at Säntis shop, Rotsteinpass, Zwinglipasshütte, Staubern, Hoher Kasten
Conditions: Very dry, snow in 2 places. One shortly ahead of Säntis, second one took us 20 minutes to get across at Mutschensattel.
Recommendation: Take cash, a lot - 3l water = 10CHF, if experienced, trail running shoes are sufficient,