MELVA-FR. This closed slipper for women is made from recycled felt derived from plastic bottles in solid colours. The sole is flat and 0.5 cm thick, and the base is made of non-slip rubber. It features a removable insole with a 1.5 cm wedge at the heel that attaches to the outer sole, giving the slipper a total height of 2 cm. It also has a pull tab for easy on and off.