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.