Sabre, Thanks for that. Mine is clearly carbon cloth inside with a brown material visible in the drilled holes. Probably the aramid. I think you are probably right that the 'kevlar' ebay ones are the same.
Limit state.
I saw these and they do look good value but I would not buy without seeing/trying on. The seller appears to have a constant supply of these helmets and headsets/intercoms. I thought it looked too cheap for a new good quality helmet and so elected to go for an Alpha. I tried a friends Alpha first to check the fit.
Check his feedback and ask a previous buyer or two if they are any good.