Then it will not be able to keep the bones from moving. Also, the cotton padding beneath is hard to dry. If it gets wet, your skin may develop a rash or infection. That means if you take a bath, you have to cover the cast with a plastic bag. You can also buy a waterproof sleeve. Depending on where your cast is, you may have to take a sponge bath. You use a wet sponge or cloth to clean the rest of your body. You can wash your hair in the sink or go to the beauty parlor. That way you don't risk getting the cast wet.
Luckily, some casts are also waterproof. This means you can get them wet without ruining the cast. Most of these are made of fiberglass. Also, the padding is not made of cotton.
