At the first sign of summer, most of us dig out our flip-flops to be worn 24-7 for the next few months. What are you meant to do then, when it's either too cold or too formal an event to let your toes all hang out? Teva has come to the rescue with the new Mush Frio series, a Mush flip-flop housed in a package you can wear all year long, for any occasion.