I usually size 47 and got a result of many reviews that say that the Betula Energy fails quite large, size 46 and ordered hoped that this is so because it does not exist in 47. In fact, he can not think of at least one size bigger! Thanks to the footbed and the low weight, the Betula Energy contributes very comfortable. The workmanship is good and I hope that the longevity is similarly well. On the whole, I can Betula Energy Recommend unreservedly and would buy it again at any time.