If the plug doesn't expand correctly in the ear, the function of quieting is reduced. If the plug doesn't seem to be in correctly, re-insert until you get it. The plug stays in place when I put my helmet on.
I definitely feel more protected by this vest and have noticed on hard landings on the MX track it significantly reduces the paint from your head snapping down as it limits the range of motion because I weigh 260lbs. The neco collar isn't as nice as the high end colors with the metal clasps and the shoulder guards are connected to the vest with a flimsy piece so I'm sure those would break loose on a crash and have to be fixed. Overall much better protection and comfort than anything else I've seen to date.
I like lead pads as they actually have sizes that fit me in XXL which no one else seems to have but they also seem to stay in place better and offer better protection and comfort. These are easily worn underneath riding pants for trail and MX being comfortable with leg sleeves or rash guard pants.
I ordered a medium and a large. I'm not a big guy but the large is way to small. So I sent them back.
They looked well built but too small... I searched the Motorcycle Superstores site and I could not find anything comparable. Such a shame, I even got on manufacturers web site and they do not make them any larger.