i have a huge head and am having a hard time finding a certified helmet

Mega Cranium = Mo Brains !

The S1 Lifer Helmet is a great fitting, top rated, fully certified and super popular helmet for Skateboarding, Longboarding, BMX and Roller Derby and we made a bigger version for peeps with bigger skulls (more brains of course)

This guy has a 25" head circumference and he wears the S1 Mega Lifer Helmet with 2XL Liners (blue liners). This helmet fits him perfectly.

Check out all of the colors of the S1 Mega Lifer Helmet here http://shop.s1helmets.com/mega-lifer-24-26-5/

Happy S1 Mega Lifer Helmet wearers at Rollercon 2015 !