These are ridiculously comfortable. I wore them out of the box for an hour + walk around the city and didn't have any issues at all. I was hoping they'd be more breathable, however, I've been wearing them in 80-90 degree weather to be fair, but I thought the vents would help. They're hot. I like them for biking as well because the tread grips my pedals. Also, definitely go with a 1/2 size up. I'm usually a 7.5 and got an 8. They fit well.