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Finally some competition may have arrived for Inov-8 in the ultralight running shoe arena. Zoot shoes, at 8.4 to 9.5 ounces in men’s sizes provide serious contest to Invo-8 for sub 10 ounce shoes designed for the serous athlete. While Invo-8 has roots in trail running and fell running, Zoot Sports comes to the ultralight running shoe market from slightly different roots, the world of triathlons.

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