From the product description (Please note that the choice of font is theirs and not mine):
Leave an impression of the Cross on your journey and you may lead another to Jesus!
Can you imagine how proud our Heavenly Father will be to look down at His beautiful creation and see Cross Impressions scattered on beaches around the world in remebrance of Jesus?
Our Brown Rhinestone - Women's Christian Cross Impression flip flops are much more than just neat flip flops. They are truly a fashion and faith product that will help you proudly display your love for Jesus and perhaps even lead another to Him!
Yes, I'm sure that when God looks at creation, he doesn't care about our misuse of natural resources or the polluting of our waterways, He really just wants to make sure that there are miniature cross imprints all over the land.
Apart from that, this is a great example of what I refer to as "lazy evangelism." It's a tool that people can use to assure themselves that they are reaching out to others with Christ's love even while they are neglecting to build actual relationships with those people. Because it's a lot easier to dream that your flip flops are saving souls than it is to actually get involved with broken and dying people. Besides, Jesus is always pictured wearing sandals. I'm sure they were just like this. That's how he got so many followers.