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The Altra 3-Sum is the sum of the three event triathlon experience. Lightweight, fast, and lightly cushioned, the 3-Sum is built for triathletes who demand the ultimate in performance. With a seamless upper, easy-on transition pull-tabs, quick-draw lacing system and heel/forefoot drain holes, the 3-Sum minimizes transition time and maximizes performance. The Zero Drop design allows for natural loading of the calf and Achilles, while optimizing the landing angle to ensure powerful speed with minimal impact. The Altra 3-Sum get off the bike and run like there is no tomorrow!
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