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Voted “Most Popular” for its versatility. Over the last two years, the KSO has become our most popular model for men for its unbeatable comfort and versatility. It features a thin, abrasion-resistant stretch polyamide and breathable mesh upper that wraps your entire forefoot to “Keep Stuff Out.” A single hook-and-loop closure helps secure the fit. The non-marking 3.5mm Vibram® TC1 performance rubber outsole is razor-siped for enhanced flexibility and a sure grip on wet or dry surfaces. FiveFingers KSO is best for: Running, Fitness Training, CrossFit, Light Trekking, Bouldering, Water Sports and Travel Men’s KSO size conversion | Your Foot Length→ in inches ± 1/8" | 9½" | 9¾" | 10" | 10¼" | 10½" | 10¾" | 11" | 11¼" | 11½" | 11¾" | 12" | 12¼" | Your KSO Size→ | | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 |
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