I was wondering that too. Discreet airholes where we can't see them? Or maybe the raincoat material is permeable to air but not water. The face shield seems unnecessary.
>>Using the new "Yu-atticus (??)" Material, the water will not get in but it will not get too hot! The correct translation is Yu-Atex, probably a portmanteau of Yukkuri and Gore-Tex, which is a material which keeps water from going in while allowing transpiration to go out.