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"While flip flops are pretty comfortable, a common problem is the flip flop blow-out, which occurs when the thong portion of the shoe becomes detached from the rest and your sandals become ruined as a result (or at least tricky to fix). An Australian company is looking to change this with their Interchangeable Thongs line. Willi Footwear created an ingeniously simple feature to the bottom of their shoes. Rather than fixing the thong portion with a standard circle, the Willi shows incorporate a boomerang shaped piece that works similarly to plastic clothing tags. This offers a more secure fit and will prevent the dreaded flip flop blow-out from happening, meaning you get to enjoy your casual and comfortable footwear for longer."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.trendhunter.com/trends/flip-flop-blowout>