There ain't nothing like a hood for comfort. Forget the modern connotations, hoods offer protection from the world, from it's weather and inquisitiveness and presence.
Just ask any medieval monk.
'cos when you/re in there the world is blinkered out and it's just you... and your headphones and text messages.
These two know this all to well, and are going for the extra belt and braces of an umbrella, just in case.