The present invention relates to one for being divided at least two components to reduce stocks (10), can easily put inventory with take off. One first part (12) has a foot part (16), the ankle portion (18) extended on ankle (14), the first overlapping portion (24) on ankle portion is formed to apply inside using the pressure reduced compared with the pressure applied by ankle portion. One second part (30) is tubulose and has the second overlapping portion (32) and a leg (34), is extended in use from overlapping portion to surround at least partly shank on leg. It can be placed in the second overlapping portion using the first overlapping portion inside, the compression of the storage for the pressure being progressively decreased on leg is provided. Form an outer surface of first part and an inner surface of second part, with offer one, fully low-friction coefficient makes compression storage by being placed in the mode on it in Shang Fang first parts first, then second part is drawn over the first portion and draws it and brings the second overlapping portion in-position around the first overlapping portion on leg, so that the channel of the second part on foot and ankle provides convenience by first part.
