Discussions on helmets or any safety related issues/items seems to raise a lot of passion here. I guess that's a good thing? I'll go to a couple of LBS and try some on for fit and comfort. I wonder if anyone has ever done a scientific study of airflow and heat dissipation with various helmets? I'll never forget fitting my 4 year old with her first bike helmet: After getting it fitted she put her head down and walked straight into one of the columns in our basement and fell over upon impact. Both the helmet and the kid were intact; equipment and rider certified!