Do you mean the GTX? They run small, one size up was too big, built for apocalypse, heavy and Stiff, what put me off was the boa fit. I don’t like it. Went for Daytona Trans Open GTS, conservative design and 3 way adjustment. Quite tall boot and wide at the top to stuff your trousers. Not an extreme off road boot. Perfect and no breaking in period. Leather is 2.8 mm thick, cow hide is normally 5/6mm thick.
Daytona TransTourMan GTX is similar to Klim, but more expensive. I really couldn’t justify the TransTour