Like the original HFS, the HFS II is super lightweight (6.7 oz, W7) so you’ll feel like you’re flying down the road. And with a new tire tread-inspired outsole, you’ll feel secure even if you go off road.

HFS II is so comfy, you might forget to take them off at the end of your run – we’ve even had people go to bed still wearing their shoes because they forgot they had them on!