Black leather formal slip ons with side buckle There"s a stylish twist or two to these formal slip on shoes from Borelli. For a start. they have genuine leather uppers in black with a padded ridge around the collar. There are also stitched seams & the discreet use of decorative studs as well as a side buckle that"s just for show. Colour black Outer Sole other materials Upper leather Lining & Sock other materials