The Best Sandal on Earth - CHACOS
It's like a massage on your feet everytime you take a step.
http://www.chacousa.com/
They are amazing!
And good to the enviornment, too. You can get them re-soled if they start to wear down. They have a really cool program where they donate people's old flip flops to Nepal. They also donate
some of their profits to environmental causes like Leave No Trace.
It's a lot of money to throw down initally for a pair of sandals -- but they're so worth it!