Trail running has never been lighter and more natural. Like our TerraFlex, the Mesa Trail gives you incredible grip with its lugged FeelTrue® sole, extra protection and comfort with the hidden 3mm TrailFoam layer, and security with adjustable midfoot and instep straps. A true trail runner, Mesa Trail is a barely-there 7.6 ounces (M9), with a breathable engineered mesh upper, and a treated sockliner for cool comfort. Like all Xero Shoes, the wide toe box and flexible zero-drop sole let your feet do what, well, feet are made to do.