I love these sandals, they're so light and comfortable and then I went for a walk and now have a blister on the top of my heels. Luckily I cut the tab off the back of my sandals so I can keep wearing them. The style is lovely and looks just as shown. They are completely flat and have no support. That said , they're  perfect for Spenco orthotics or other brands offered by Amazon. I added a full insert which corrected my needs and feel comfortable. I did go up a size to make room for my inserts, and definitely cut the tab if it starts to rub.