probalby because your not used to them, they make you stand up really tall and they are hard to flex forward, when your reguallarly skiing you flex forward alot more than off jumps and the boots are made for jumps and rails, you should get them worked on the flex forward more or just wait for them to break in, my friend clarke has had them for a while and they broke in and flex forward fine now, if you really want to figure it out just put on one of your old boots and one of your new ones and check it out