"I wear a white coat."
When you use a verb with "Te" form and add an "Iru" it becomes Present Continuous. For example: Hanasu (to speak), hanashimasu (I speak or I'll speak), hanashite imasu (I speak or I'm speaking), 話している (hanashite iru = I'm speaking).
You can use "iru" with many verbs. Can you understand it?