Open shoe, such as a slipper, sandal and the like

1. An open shoe, comprising: a sole with which an insole and an upper are associated, said insole having part of its edges engaged in a corresponding recess which is provided as an undercut on the upper perimetric side wall of said sole and is formed by an inward rim, which is likewise perimetric and has, for each side of the sole, a discontinuity for guiding insertion of said edges of the insole in said recess, characterized in that the discontinuities are arranged at or along part of regions of the side wall where the upper connects to the sole so that the discontinuities are not visible when the open shoe is viewed from above.

2. The open shoe of claim 1 , wherein said sole is provided with a plurality of water drainage holes.

3. The open shoe of claim 1 , wherein said upper is connected to said sole by a bonding means selected from the group consisting of: adhesive bonding, sewing, and thermal bonding.

4. The open shoe of claim 1 , comprising tabs with heads, and shaped seats that are open on a tread of said sole, said upper being separate from said sole and connectable thereto by way of said wherein said tabs pass through said sole next to the side wall thereof and are arranged between said side wall and an edge of said insole, said heads of said tabs being adapted to be arranged each in a corresponding complementary said shaped seat.

5. The open shoe of claim 1 , wherein said sole and said insole are made of a molded plastic material.

6. The open shoe of claim 1 , wherein said insole is provided with a plurality of water drainage holes.