Picking Climbing Shoes
If you have been climbing with tennis shoes you are up for a nice surprise. Climbing shoes make gripping the rock a piece of cake. Climbing shoes are made of mainly leather and rubber that is designed to maximize friction on the rock.

The best way to choose a good shoe for you is to go to your local rock climbing store and try on as many as possible. After you know your size though, the internet has lots of great blowouts often allowing climbers to pickup shoes from 30-60 USD when they normally cost between 70 USD and 200 USD.

Do not expect climbing shoes to be the same size as your running shoe. They are often two sizes off. Rock climbing shoes should be tight but not painful (loose climbing shoes can limit your performance). Keep in mind that the leather on climbing shoes tends to expand after multiple uses.
Full Article