<a target=new class=ftalternatingbarlinklarge href="http://pressroom.thevest.com/
">http://pressroom.thevest.com/
</a>
This is the link to the vest website, maybe not the main one but the one that I use to navigate around the site. There should't be a reason why your son can't use it at three, you just have to make sure that it is fitted correctly. I am not the mother of a young child but the wife of an older child (at heard) and he was going to participate in a research study for the vest, but since he already used it he couldn't participate. But there were other participants, some as little as 2 who were a part of the study.
I would look into it a bit more if you are really interested. Also, do you have medicaid or state funded insurance for your child in addition to your primary insurance? If so, you might want to look into seeing if they will help pay.
Julie (wife to Mark 24 w/CF)