I want these too! Love the concept.
So much that I even compiled the pictures in photoshop and put arrows on them.
But yeah, they imprint words into the sand. I don’t even go to the beach that much, and I’m really cautious about buying flip-flops after the last ones caused my feet to break out in a rash .. but I’d still get these. And wear them. And run all over the beach to get the markings (well, okay, maybe that won’t be the best way to make marks with them). But nevertheless! Sacrifice.
Maybe in the future they’ll have more sayings on the bottom, or maybe you can customize what kinds of words you want to put on them.