I don't know Charles Owen's but I recommand you Kep helmets, they can fit all shapes of heads (egg or circle) so they are more comfortable than others and safer as the helmet is more adjusted and won't move. Besides, the inner padding is washable and you can purchase it alone in various sizes for the same shell. The ventilation is very efficient even during heat pikes and you can close the grid when days are cold.
Little extra, they are less common than the Owen and quite pretty shaped.
I totally recommend IRH helmets!Extremely comfortable and breathable fits like a charm and conforms to your shape!! Also not too $$$ so it will give you style comfor and safety without breaking the bank🙏🏻