Helly HansenMen's Crew Hooded Midlayer Jacket Hooded Jacket (pack of 1)

What is the plastic bit on the back below the collar for?

Hi is this the 2018 jacket or 2019? I’m after the 2018 in navy - they changed the colour in 19 to a lighter ‘bluer’ navy. Many thanks. Ben.

Any tips on how to get rid of the creases, slightly sceptical to use towel & iron & med temp tumble dryer. Hmmm. Thanks

Is the hood detachable ?