A removable innerboot of a sports boot, the wall of which innerboot
comprises a rear part (3) which is stiffer than a front part (4), wherein
the wall of the innerboot comprises at least one layer comprising in its
stiffer rear part (3) a first element located alongside a more flexible
second element of its front part (4), these two elements being fastened
together by an edge-to-edge seam (5).