I skied the XLS from 81 through 87, worked really well for me. Still have them. I modified them with the XLR's cuff-cant hardware and pulled the rear anchor rivets and did a tiny bit of dremeling of the leading lower edge of the upper cuff to soften them slightly in forward flex. I haven't tried them on since 87 though. They were my best fitting boot up until my current ones which are Rossi B2 from 2004.