I bought these tennis-boots to travel up north in Wisconsin after Christmas. They were perfect for travel, walking on slippery pavement, in snow (water-proof) and especially comfortable on the plane. They are roomy enough to let my claustrophobic feet breath. I did get a half size larger from experiencing them in a store. I also have a tennis shoe by Sketchers that I also found worked better in a half size larger. Both have the memory foam and are lightweight (like nothing) and extremely comfortable! In addition, they are smart looking and not too clunky. The only negative is that the leather shoe strings have a tendency to come untied easily. I am 61 and an active fit female.