Dan asked where this lycra body bag can be bought. I found a latex version in this shop .
This puppy bodybag combined with strait-jacket and hood can be made out of 1.2(!!!!)mm latex, what makes it extremely restrictive and escape-proof. Of course, hands must be placed behind the back. No additional ropes or straps are needed, because the existing waist-crotch straps will effectively hold arms in place. Also check this version.
As an idea, imagine this bag combined with pants with hood.
The downside is – self-bondage not possible.
You can get them here
http://shareweb.com/catalog/index.php?cPath=71_72&osCsid=f27o7hrp1b3ggjqjfajbmkopl3
Nice site! But check the price tags. You can get the suits on eBay at least two times cheaper.