A slipper. (Made this up today, but almost definitely will have been made up before by someone else)
Slippers
A pair of slippers.
Because there are already too many targets. (credit: some old veteran bum looking guy sleeping on a bench at the police station I went to today.)
It's After Earth Day.
Sneakers
A: The balls are lighter and you don't have to change shoes.
The grip.
A: It's all in the grip.