What is the sunnah method of wearing a hat on the head?

What is the sunnah method of wearing a hat on the head.

The hat is made of cloth.  It is Sunnah to have a white hat.  Hazrat Rasulullah Sallallahu Alaihi Wasallam used to wear a cap that stuck to his head.

  Therefore, in many places, plastic caps, palm ash caps, paper caps are seen in practice, it will not fulfill the Sunnah. 

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