I love the skele-toes! To be completely honest, I've not yet used them for outdoor running, just in the gym and on the treadmill. But I cannot wait till running season starts here in Florida so I can try them out on the running trails. I love the way they feel on my feet, it's the closest thing to running barefoot. Every runner should have at least one pair. I plan on buying a third pair. If you can get a good deal on them like I did on Amazon.....why not?