I can’t wear slides. I can’t keep them on my feet. I have this one:
http://www.qvc.com/qic/qvcapp.aspx/view.2/app.detail/params.item.A188244.desc.Clarks-Bendables-Leather-Multi-Strap-Sandals-wAdjustableStrap
It stays on and is comfortable. I also have this one:
http://www.qvc.com/qic/qvcapp.aspx/view.2/app.detail/params.item.A200094.desc.Clarks-Unstructured-Leather-Multi-Strap-SandalsWith-Backstrap
Have you ever tried wearing thong sandals? They stay on much better than slides.