| 摘要 |
The boot consists of a sole (5) and an upper (2) equipped with a rigid stiffener (3) which passes round the heel and extends along at least one side of the boot as far as the metatarsal-phalangeal flexure zone and upwards to a point just below the ankle or the pivot point (7) of a flexible upper collar (8). The stiffener can extend further along one side of the boot than the other and be lower at the heel than at its highest side point. It can also be made in one piece with the rear part of the sole and be fastened to the boot via a flexible element (13) covering the same area. The preferred materials for the stiffener are, for example, plastics reinforced by glass or carbon fibres, or metals, having a rigidity of 260 MPa to 200 GPa. |
