The Skike Shoe Frame is made of varnished aluminium sheeting in one piece (no welded joints). Sometimes a little varnish can flake off when bending the shoe frame, which is often inevitable. It is necessary to bend the shoe frame so that is exactly fits the shape of your heel.
The shoe should be tightly slid backwards into the shoe frame so that you get maximum hold. Ideally, the sides of the shoe frame should be parallel to each other and not get wider towards the front. It is best to remove the show frame using a spatula because the velco fastening is so tight that doing this by hand could bend the shoe frame or rip off the velcro.