The leather sensory deprivation sack is an essential portion of all serious slave training regiments. After a long day of tumultuous activity, a good boy can earn some quiet time as a leather mummy. Of course the sack offers many ways for me to keep the subject under full control. Easy access ports allow me to push any buttons I want, when I want to. This little freak took a nice caning for me today so he has earned a long relaxing time, immobilized and in the dark.