I've been buying the same summer time tennis shoe for the past five years. I love to slip Supergas on with and without socks. They are an Italian brand that is made with a high quality. I just went to buy a new pair because I've worn out the ones I currently have and Sole Society has them on SUPER sale. $17 rather than $69 for women.
They have so many color choices - I tend to stick with white, black and navy.
They also have the kids versions on sale too!
Run and get them quickly before they run out of your size!