Pouches on a PALS webbing would be an overkill and could qualify as a carry on bag, as it is indeed a bag. Some inventor made this (http://consumerist.com/2012/10/30/avoid-baggage-fees-with-wearable-luggage-if-you-dont-mind-looking-completely-ridiculous/) and people wear this specifically flying Ryanair. HTH.
I can tell you I have done this many times and have carried over 15kg in my coat that has 7 big pockets. I know this because as I was waiting in the queue in Poznan, there was a free scales (unlike UK airports) and I had an idea to see just exactly how much I had in there. The airline did not bat an eyelid.