Since their invention in 1948 in the US, these non-slip soles have prevented dangerous falls. Adhesive, just stick them onto the soles of your shoes : your shoes become virtually non-slip, both indoors and outside, on wet paving stones or even black ice. You are safer… and your shoes last longer! Suitable for both ladies’ and gents’ shoes. Size of sole : 8 x 5.5 cm.