One of the reasons why slip on shoes are popular here in Malaysia and actually the whole of Asia is that we remove our shoes quite often. When we are at home we usually go around barefoot. WHen we visit the houses of others we remove our shoes. When we enter a mosque or even some temples we usually remove our footwear. So this usually means having shoes that come off and on easily. A shoe horn would come in handy at times like these. But you cannot go around carrying a large shoe horn everywhere you go and if you are travelling, a normal one would take up space. Something portable and small is what you need.