The Altra 3-Sum is a zero-drop, natural triathlon racing shoe designed for a neutral foot motion.
Run natural off the bike with the Altra 3-Sum. Designed to meet the needs of the competitive triathlete, this racing shoe features a zero drop platform to encourage an efficient stride, while retaining the underfoot protection you need to tackle longer distances. A seamless upper is tailor-made for sockless wear, and a quicklace system allows you to fly through T2. An anatomical fit allows for toe splay without sacrificing security.
The 3-Sum is a minimum featured, minimum neutral shoe intended for training and racing.
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