Most flip-flops aren’t very high-tech. That's just the nature of this kind of footwear. Unless they’re being made by Olukai. That company's Kia'i II flip was researched and developed with the Hawaiian Lifeguard Association. A hand-picked group of elite guards—from Oahu, Maui, Kauai and the Big Island—collaborated with Olukai engineers to review designs, test prototypes and influence the development process over a period of several years.