Funny thing about wool tights

I love wool tights. They are the PERFECT thing to wear on cold days in Germany. They are fashionable. They are WARM (most important). And of course, they are readily available all over the place here. I love them. Except for the one small fact that they grow. Yes, GROW! As the day progresses wool tights get longer and longer. So, by the end of the day I have a pair of tights that I can reach from my toes to my head. Seriously. What is up with this? How do I prevent this? And most importantly, can I count constantly pulling up my tights as my daily work out routine??????