only a snell approved helmet. as a group we are bringing extras. i'm bringing 3 myself. good to hear from you vin. i couldnt get on this site for a while. and addictive is not the word. there are three run groups for street cars and one for race only. it is an incredible deal. we signed up early and paid 225 for two days, a banquet, two free drinks and a nice shirt. even those of us w/track experience are going in the green group so we can help 1st timers out. and we will hold pretrack lesson as several of us have experience as on track instructors.