Speed Force II is Xero's lightest performance shoe, weighing in at 6.5 oz. per shoe (M9). If you take out the removable insole for an even more barefoot feel, the shoe weighs even less!

The biggest change: a new, elegant, super-breathable upper with welded components for extra durability.

With a flexible 4.5 mm thick FeelTrue™ rubber sole, your brain gets the feedback it needs to help you move effectively, efficiently, and enjoyably.