Originally Posted by MiniMatt

Need2Ride - I wouldn't worry. First off you have covered the most important safety feature of any helmet - "the helmet I bought was not cheap or expensive, but it fits well and is comfortable" - a well fitting lid is by far and away the most important bit. Some folks heads just suit different manufacturers.

Originally Posted by MiniMatt

There are very few experts in the world of motorcycle helmet construction. The few that there are spend their time designing safety standards and new ways to break helmets; not in shops selling helmets, and, with the greatest of respect to posters here, the rest of us are left with some partial knowledge, some educated opinion, and experience.

Originally Posted by MiniMatt

I am not an expert. I'm not even in possesion of advanced chemical or kinetic forces knowledge.

However, your helmet, if sold in the UK, will have had to pass some very stringent safety standards. Your helmet passes ECE 22-05. Google it. Helmets certified to this standard are approved for competition events by AMA, CCS, FIM (Moto GP), Forumla-USA, and WERA (amongst doubtless others). I also understand your helmet is ACU Gold certified (look for gold sticker on the back).

Originally Posted by MiniMatt

There have been several studies of motorcycle crashes over the last 25 years that have attempted to evaluate any protective advantage or disadvantage of helmets meeting one standard or another (Hurt, 1981; Otte, 1991). No advantage has ever been shown in these field studies for any particular standard.