Thanks for everyone's replies. My friend, OT, and I agree and are going with Dream Catchers Weighted Blanket at www.weightedblanket.net They have a good reputation to being well made and durable plus they have a blanket exchange program as the child grows or needs more weight.
To answer Hollybonges and LorieRussel the weighted vest and they also put a nuraprine tight vest on him at school and it helps to keep him calm, not so sensory seeking, and focused. It helps him feel his body and feel secure.
My son burrows under the pile on his bed completely and yes, he covers his head. I turn the fan on high and point it towards the pile as I say goodnight. He often after he's asleep will wiggle his head out, but the rest of him stays covered. That's why our OT even said a weighted blanket would do him a lot of good. I think he'll sleep better too because if things fall off the pile he wakes up.
Good luck everyone!

My son doesnt require that much weight, but I ordered a bed sheet on line that compresses him while he sleeps. Its nice too because it doesnt make him hot, like some of the weighted blankets can. He loves it. The website is http://www.laceandfabric.com
When my son was 3&4 he would carry his backpack around the house and stuff TONS of item in it. Didnt know why then. Now I think what a clever kid trying to find his body awareness! The sheets for a twin bed are around 20.00. Good luck

EthanMom I was surprised today when Dream Catchers asked how tall my son was and actually recommened a heavier blanket than the 7lbs. They recommened 11 lbs for a full size or 9 for a twin.
Chris and Home I'm really not worried he won't like it. He seeks out getting under things with weight all the time and right now he has 6 blankets, two sleeping bags, and heavy afghans on his bed plus 2 over sized pillows on top of that and on the very top of the pile a bean bag chair. He sleeps under all of that and keeps asking for more. So, yes, 11 lbs sounds about right.(:

oo im sorry to hear your child had the effect...but yes sometimes things are not for everyone, with the melatonin we only gave it to him for a week until his circadim rhythm adjusted..with his weighted blanket we started with 4lbs..till today it has helped.

Not sure exactly what you are asking, but I'll try to reply to the question. My son went into 1st grade this year and the challenges for him were mostly how to communicate what he wanted or needed. How to obey the social rules of school i.e. staying seated, not talking out of turn, raising your hand, lining up, and in general obeying rules not just running around the classroom. Plus he had behavioral issues with hitting or head butting when frustrated or someone was too loud or there was too much activity too close to him etc... (Hard to generalize this)
He's ASD or some people call it "classic" autism. He can talk, but it isn't very communicative. It is repeating phrases and asking the same question over and over even when he knows the answer etc...
A weighted vest and a pressure vest they starting putting on him at school to help him focus. It didn't eliminate these behaviors, but helped him to stay seated most of the time, listen to requests and he responded well to doing those requests more often. He didn't get as frustrated and lash out physically as often. He had a bit more receptive language. He was a bit calmer. He was less anxious. So the behavior overall improved. It was no magic pill, but it improved tremendously. It is a journey.
He has always sought out deep pressure. He loves being squeezed under pillows and hugged and put into tight clothes. He loves tight things around his head. He seeks vestibular input (hence the head butting).
When he doesn't wear the vest etc...or get squeezes during the day then he can be harder to deal with in day to day functioning.
He's also been piling stuff on his bead and heavy blankets forever. It just has gotten to the point of ridiculous that more stuff falls off during the night then stays on and it is so hot in the summer. So his sleep is disturbed. His OT said it is time for a weighted blanket even though piling the stuff on is cheaper for us, but the actual blanket will have a certain weight to it and stay on his bed better. It will help him sleep. He's always had some problems sleeping too. (And all you people out there that swear by Melatonian, he's a kid that can't take it without it giving him severe night terrors and panic attacks. It does the same thing to me and several other people I know. Meletonian isn't for everyone neither are weighted blankets, I'm sure.)
Yes, the formula for a weighted blanket is 10% of the weight person it if for plus add one pound. So, my son is 63 lbs---10% of that is roughly 6 plus 1 is 7. His blanket will be 7 lbs. Some people find using them that they need more weight, but it is good to start out with the formula and see how it goes.
There are lots of places you can buy weighted blankets and you can make them yourself. You have to be careful about what they are weighted with and the washability. You also have to make sure they are durable if you have a child that is rough on stuff (like mine). So, that is why I'm going with Dream Catchers. After asking around and looking at the web site they seem convincing that they make the blankets well, treat customers well, and really have thought hard about what goes into their blankets and why. Yes, they are expensive and you can get them cheaper, but it's not just about price for me. Each has to make their own decision.
So, there's my long answer to your question. I'm not sure if that is what you are looking for, but there it is.