This company in Montana makes custom weighted blankets. Weighted blankets are used for those on the spectrum. The weight provides security and calmness when used.
I have considered purchasing one for my son before but now that I viewed this site, I will make the investment because currently, my son piles on 4 - 6 blankets seeking results. Once I receive and my son has used it a little while, I will write again with a review.
The website is: http://www.weightedblanket.net/index.htm