Hello,
as I follow the forum I see that you can help with my problem. For several months I was deciding on the purchase of boots for winter ascents, easier ice climbing etc. Somehow Raichle GTX all degree fit my foot the best so I bought them. Now I have done some winter ascents, as much snow as there was, and encountered a problem. After a few minutes the laces completely untie even if I tie them very tightly. I wonder if someone knows what the problem is. The boots are 1 size larger than usual shoes and my foot sits nicely in them until greater effort. Thanks for help.