It slips on like a sock, and it sort of looks like one too. Yet moments later, I’m in an impromptu sprint with the guy next to me. I win, but it’s unfair of me to gloat. The other guy is wearing a suit.

I’m at Nike’s worldwide headquarters, overlooking what appears to be a World Cup–worthy acre of perfectly flat green grass. I’ve just tested out the nike air max uk, one of the new products the company announced today. I love the feel of this shoe. It’s like wearing a second skin....