Yes, Reefs are flip flops. I bought a pair yesterday at a store in our mall. They are really comfortable. They have a nice thick sole, but they are also very soft. They do have some arch support. I know I'll enjoy wearing these this summer even if I don't wear them to the parks in WDW.
I'm still a little worried about wearing flip flops to WDW. If someone steps on the back of my flip flops then I'll trip and fall.
Here is a link that shows a picture of the pair I bought.
http://islandsurf.com/Sandy_Reef_Sandals-p1299c5.html?&Customer_id=5454119&st3=SIXNN538354430&

I'm still a little worried about wearing flip flops to WDW. If someone steps on the back of my flip flops then I'll trip and fall.

Here is a link that shows a picture of the pair I bought.
http://islandsurf.com/Sandy_Reef_Sandals-p1299c5.html?&Customer_id=5454119&st3=SIXNN538354430&
