Alli has a tendancy to move her head around a lot in the trailer (I rode with her for a bit -I know, I know... tut tut) and I don't want her freaking and smacking her poll on something and causing her self damage.
I was quite happily going to buy one of these:

But I also saw one of these which have more padding, but surely they only protect the part of the head where the headpiece of the headcollar sits and the headcollar could quite easily slip back...

So, anyone favouring either one? Or is there a happy combo of large surface area coverage and lots of padding, out there somewhere?