not to barge in on your thread, but it really is wise to buy your own helmet.
I 'borrowed' from TDE (Texas Driving Experience) when i did a couple of track days, borrowed from a couple of other people a couple of times in Tulsa, and really.....
somebody else's sweaty helmet, besides it not fitting correctly--- ick!
worth buying your own if you think at any time in the future you might do a track event a couple of times a year.
Besides, they look cute with little stickers and things on them.
Kristen
(borrowing is fine if you have to, but consider getting one that fits YOU if you're going to do this a few times!!)