Having had a few motorcycles, I can tell you that even a shorty helmet on a hot day was uncomfortable enough to keep me from riding some days. On others, it certainly took some of the enjoyment out of the ride. That said, I've never felt really uncomfortable even in a cheapier $20 Bell bicycle helmet. IMHO, they are light enough, breath well enough and protect well enough for anything i'm doing on anything with pedals.. Of course they do come with their own flavor of "dork factor" but I'm well past wowing the ladies anyway. ( That went with the motorcycle come to think of it )