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When you invest so much in your carrier, you don't want it to wear out quickly and look worn out. That's why the snacks are there to protect the parts of the carrier that get dirty first, i.e. braces. These parts are the closest to the baby's mouth and the dearest to those who are growing teeth, so they are the first to be hit. In order not to wash the entire carrier after each use, protect it with snacks that you can wash after each use of the carrier (the method of washing depends on the material from which the snacks are made).