Tommy HilfigerMen's H2285arlow 1d Fm0fm00596 Low-Top Sneakers

Are the red insoles supposed to be removed before you wear the shoes?

What is the best way to clean these trainers?

Is it 44.5 german size or 44?... i know that 10 uk is 44.5... but this table says 44 german.

What material is the top of the shoe, it looks like leather (faux) in picture but says canvas in description. Need dry feet