4 points
I was assuming that it was bicycle helmets that you were referring to with the comment about a ‘styrofoam [sic] skull cap’.
I used to commute about 28 miles/day in Chicago by bicycle (I lived in the Little Village, Humboldt Park, and then Austin neighborhoods while I was working in Skokie); a heavier, fuller-coverage helmet is miserable outside of late fall/winter. The weight and ventilation difference is far, far bigger than you can imagine, unless you’ve tried it. Overall, I would recommend using a bicycle helmet when you’re on a bicycle, and a motorcycle helmet when you’re on anything with a motor.
