http://www.erestraint.com (this site is not for the under 18 crowd for anyone else reading this) they cost $149 + $20 to ship. This is currently the best price. This is a REAL STRAITJACKET, it is the same straitjacket I am wearing in the picture and the same one sold to police and hospitals. You will need the right size by weight and chest size:
------------- weight-----chest
Small---80-120 lb--- 32-39 in
Med----110-155 lb---37-45 in
Large---145-190 lb--43-49 in
XL-------180-230 lb---47-52 in
If you are between sizes the proper fit is the smaller one. If you get one too big your freind will know your cheating. They are difficult to get out of but not imposable, there is a good chance that it will take a long time or that you wont be able to do at all. On the good side, if you can't get out of it they are comfortable to wear for a few hours.
Most escape artists do not use this model straitjacket, they use a gimmicked one or the wrong size. I am one of a very small group that uses an authentic “Posey” straitjacket. Good luck.
I will be breaking the Guinness World Record for fastest straitjacket escape during my show on July 4th.