Not met poor fit, expectations

Property me these headphones for sports (jogging) ordered, as I always have the problem that my plugs from the ears to slip when I start to sweat. Due to the earloop I hoped a firm hold on the ear. Unfortunately slip the strap during exercise ever again and you have to constantly grab your ear in order to press the headset again. Very, very annoying, so in my opinion, inappropriate.
The brackets are flexible, but can not be individually bent, but retain their shape. Presumably there are people for whom the predetermined shape fits 100%. For me, unfortunately, not at all.
The sound is without defects (hence 2 stars), but the active sports use (for the headphones is expressly touted) in my experience, unfortunately unusable.
Will probably need a little deeper into their pockets to get some well-fitting headphones.