After my first runs, I was seen by the price Leistungsverhätlnis ago more than convinced. The band is tight, the display is very good to use the material and makes a robust impression.
THEN came the rain: On my last run I had to put back about 30 minutes in the partly strong and partly sunny periods. Unfortunately, the hole into which the headphones are plugged in, not lockable, here it can rain so pure. Therefore, I have the band just turned around so that the headphone jack is below. As far as no problem. The band has unfortunately failed anyway. Already while running, I noticed that film that protects the display, fogged from the inside. When I took the unit after the run out at home, it was on display, damp and up and down. This is of course not at all. Tape was properly attached and sealed. In my opinion, the moisture is simply caused by the material, so nothing to repel water.
So far my smartphone works fortunately still properly. If it thereby however have come to harm, I will ask the company for damages. Because here is quite clear "water-repellent" advertised with the property, which is not the case defakto.
Therefore, I can unfortunately only say: hands off use of the product or never in the rain.