Why is Jiraiya’s headband different?

Why is Jiraiya’s headband different? Jiraiya used to wear a Konoha headband: But by the time Kushina was pregnant, he switched to a new one and wore that one from then one.

Jiraiya used to wear a Konoha headband: But by the time Kushina was pregnant, he switched to a new one and wore that one from then one.
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