FUEL in Helmets February 15, 2014 · Report reply Bought a FUEL for tandem work and the occasional fun jump with a go pro. It's very comfortable. I have a XXL (typically wear an XL with most other manufacturers) and it fits like a glove (I suggest sizing one up than normal for a FUEL). The chin strap adds an additional layer of comfort as well. It has a slew of options you can order with or add later BUT it's limited on camera compatibility. I jump a GoPro2 and I have no issue but a contour or sony camcorder would be hard pressed to fit. If you are looking for an excellent overall open face this is one.