Few things are more psychologically restrictive than a head harness. They can be used to tie someone down, to pull them around, to gag them, to blindfold them, to restrict their sense of hearing, or simply as part of an outfit - there are dozens of different types, and they tend to be adjustable to make them suitable for use with people of all sizes. They have many similarities to bondage hoods, but while a hood tends to cover the entire face, head harnesses are more commonly comprised of a series of leather straps held together by metal hardware and fastened with buckles.