What Our Gearhead(R) Experts Are Saying:"I have been putting the HFS II through its paces on pavement, light trails, and everything in between, and it holds up beautifully across all of it. The zero drop heel keeps my stride feeling natural, and the wide toe box means my feet actually feel better at the end of a long run than they did at the start."There is a certain kind of shoe that earns a permanent spot by the door, the one that gets grabbed for the morning run and somehow never makes it back to the closet because it is too useful for everything else. The Xero Shoes HFS II Running Shoe is exactly that shoe. At just 6. 7 ounces, it disappears on the foot, and the tire tread-inspired outsole grips confidently whether the route stays on pavement or drifts off road. What sets the HFS II apart is the philosophy behind it. The wide, foot-shaped toe box lets toes spread naturally rather than getting compressed with every stride, and the zero drop heel promotes proper posture and a more efficient, natural gait. A thin BareFoam layer adds just enough underfoot protection without burying the ground feel that makes barefoot-inspired running so effective. The result is a shoe that feels broken in from the very first mile and keeps getting better from there.