This new style of Havaianas, Flash Urban Flip Flop, are perfect for those mellow beach/river days. The back strap allows them to stay on my feet even in water. When I step in sticky wet sand or mud I don't walk out of them. I love the look of them and I feel more secure. Best part is that they look dressy so I can wear them out after the beach.
Pros: no slipping out of sandal, feels more secure, great as an everyday sandal.
Cons: not durable enough for more hardcore sports, such as rafting or 'bouldering'
photos via sincerelyjules.com