WEIGHT: M: 227 grams, W: 198 grams DROP: M: 2.7mm, W: 4.8mm CUSHIONING: 81
The Duo is lighter than it looks, despite the fact that our lab test found it has the thickest and softest forefoot (no surprise, given Altra’s founding principle of ‘zero drop’ – their goal to keep the heights of the heel and forefoot as close to level as possible).
The outsole has only rubber in high-wear areas to save on weight, which could mean it won’t hold up through months of kilometres on the road. Still, our wear-testers didn’t notice any issues with durability.
The tongue has soft foam to prevent irritation from tight laces, and the heel cup is reinforced for added stability and comfort.