Training bras are very similar in style and comfort level to sports bras. They are not designed to add curves or to be worn with slinky outfits but are more so created for comfort and growing stages. Training bras are usually worn throughout puberty, as the body is developing and the breasts are growing. These bras are generally made from a cotton or nylon-blend. They can feature adjustable straps and front or back clasps, but are generally not focused on cup size. They allow for the body to change without requiring a new bra every step of the way. Training bras also help to alleviate some of the self-consciousness that girls may feel during puberty. When looking for a training bra think of comfort and stretch. There are many great places to look for training bras including Aerie and Jockey.  The average price you should expect to spend for a training bra is $30. Going shopping for a training bra is generally one of your first bra shopping experiences so it is a good idea to go with your mom or a friend for honest feedback and to help in your decision.