By far my favorite baby slippers are Zootjes. This Dutch slipper is made of very soft leather, has a velcro strap and allows your child to feel as though they are walking around with bare feet. They come in a wide variety of colours. I like the fact that they do not have any prints which makes them fit with any type of clothes. When my son wore them, they never fell off nor did it give irritation around the ankles which sometimes happens with elastic ones. Zootjes are available in many European countries and in Japan.
PS. If you wish to have these ones for yourself, then your wish has come true. Go to Zook, the grown-up version of Zootjes.