Nike Free’s are my favorite sport shoe style and I own a closet full of them. They are light weight, comfortable, and flexible. I love the way they form to your foot almost like socks. I wear these shoes out on the trails hiking and trail running. I also work in the medical field and I’m on my feet running 10-12 hours, 4-5 days a week, and always have my Nike Free’s on ready to hit the ground running. I have had a couple pairs for 3-4 years now and they have held up great!