Altra’s original Zero Drop road shoe has been upgraded!
The Altra Instinct 4.5 features a brand new engineered mesh upper and updated midsole for comfort and durability. The outsole is now full rubber for enhanced durability, and the insole is one piece for a better underfoot feel. Hit the road or the race course in Altra’s original style.
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.
ZERO DROP™ PLATFORM
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.
Made of recycled materials, this unique layer sits directly under the foot to reduce the impact of hard surfaces and return energy return into each stride. It’s literally a layer of bouncy ball between the road and your feet!
Grid-like flex grooves in the midsole allow your foot to flex where it needs to for more speed and better performance. Unnecessary midsole was removed to create the flex grooves, making the shoe incredibly light and fast.
An outsole designed for your foot makes sense doesn’t it? Our road shoes feature FootPod technology that maps the bones and tendons of your foot to provide a natural, easy flex. This sets us apart from the predetermined flex of other shoes that force your foot to move the way the shoe does.