Very refreshing, it smells like you want to lick it! Some flight attendants have mud and sweat stains on the insoles of high heels.
There are usually 3 kinds of smells, 1 is the leather smell of shoes, 2 is the sweat smell of feet sweating, and 3 is the sweat smell of feet sweating a lot. Basically these 3 kinds of smells. The smell is different from person to person. A few people are not smelly.