Altra 3-Sum Shoe - Men's (A1224)
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The 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!
Weight: 6.7 oz
Ideal Uses: Traithlons, Running, Road Racing, Speed Work
Platform: Zero Drop™ Platform, FootShape™ toe box, Natural Ride System
Stack Height: 18 mm
Midsole: Blended EVA/AltraBound™
Outsole: Blown Rubber SpeedPod
Insole: 5mm Contour
Upper: Minimal Liner / Sock-free Liner, Treated for Anti-odor / Anti-bacterial
Lacing Structure: Custom Yankz Quickdraw Laces for customized fit and faster transition
Other Features: Seamless upper, Easy-on Transition Pull Tabs, Quickdraw Laces, Heel and Forefoot Drain Holes, Vegan Friendly, Natural Ride System
Places your heel and forefoot the same distance from the ground to promote low-impact technique, naturally align body posture and strengthen lower leg muscles weakened from running on elevated heels.
FootShape™ toe box
Allows the toes to relax and spread out naturally and the big toe to remain in a straight position for more stability and a powerful toe-off to maximize running performance.
This unique outsole and midsole componentry allows you to run the way you were born to by combining metatarsal mapping, a fully cushioned Zero Drop platform and FootShape™ toe box.
Made of recycled materials, this unique layer sits directly under the foot to reduce the impact of hard surfaces and return energy into each stride. It's literally a layer of bouncy ball between the road and your feet!
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