Engineered mesh upper: Improves breathability. At least 50% of the shoe's main upper material is made with recycled materials to reduce waste and carbon emissions: The sockliner is produced with the solution dyeing process that reduces water usage by approximately33% and carbon emissions by approximately 45% compared to the conventional dyeing technology: Reflective details: Help improve visibility. Lace garage tongue feature: Allows the wearer to tuck in their laces, so they don't come untied or snag anything when they're running.