Product Review

• Designed to meet the needs of the competitive triathlete, this racing shoe features a zero drop platform to encourage an efficient stride, with enough cushion to keep your tired feet happy to the finish line
• Fully cushioned zero drop shoe for running, triathalons, road racing, speed work
• The Altra 3-Sum was the brand's first shoe designed for the rigors of triathlons
• It'll keep you speedy through transitions with its tri-specific specs and help you run naturally through the finish line with the brand's signature technology
• Transition times shouldn't cause stress, so keep them to a minimum
• Featuring a seamless upper for sockless wear and a quicklace system that allows you to fly through T2
• Easy pull-on tabs take any fumbling with your shoes out of the equation, especially when you add a quick-lacing system to the 3-Sum's design makeup
• Feet get to work and flex naturally because of Altra's zero-drop platform, which encourages a midfoot strike with minimal impact
• Make sure you're ready to run the minute you hop off your bike
• Rubber sole