These soles do not appear to be available anywhere, so the claim of alpine compatibility is misleading. If I could find the alpine soles I would buy a pair
Everywhere else is seems to say that Alpine DIN blocks are included with the Factors, but here on backcountry is states they are sold seperately. Is it that previously factors shipped with other blocks, but newer (2011?) factors come with Alpine DIN blocks and backcountry has older stock? Or is there another explanation?