How does the FR SL Speed V1 fit?
Measure your foot and order the size that matches your foot length in FR's chart. Between two sizes, choose the larger size.
Can the liner be heat molded?
Yes. The Intuition foam molds to your foot as you skate, and it can be heat molded over the whole foot or just one spot. FR says to try both skates on first with any insole you plan to use, and to mold only if they fit.