I only buy Havaianas, they are the best in my opinion. They're durable and comfortable.
Havaianas also offer slip on shoes which sound like they may be more comfortable and lightweight for your summer walks and preferences...
http://us.havaianas.com/mens-shoes/
If you don't like flip-flops I'm of the opinion you simply shouldn't wear them, but that doesn't mean you can't have comfortable feet this summer
