My goodness I go off-line and suddenly a lot of activety. First a few definations.

Armbinders are long leather 2 arm or 2 legs devices that cover most of the arms or legs and normally laced tightly.

Sleep sacks are large bags normally secured around the neck of the sub to sleep in, some are of vinyl and can be vaccuumed to be form fitting restricting most movement. Please be aware that these are dangerous to wear for more the half an hour.