Man therefore gets his vitamin A by eating plants which are rich in carotenes or by eating those parts of domestic animals which are rich in the vitamin itself: liver, butter and cream from milk; egg yolk; and cod-liver oil.
If the vamp is too loose, your heel may slip out of the shoe, while a vamp that is too tight can cause toe pain or numbness. Counter. The heel counter is the back of the shoe that holds the heel in place. A stiff counter offers greater heel control and stability.
The heels of bowling shoes are usually made of rubber to make it easy to brake your slide as soon as you release the ball. People who bowl often might even have their own custom bowling shoes that have rubber soles on their non-sliding foot and a slippery sole on their sliding foot.