This is a male chastity device that consists of a zippered black rubber pouch held in place by a thick, shiny, buckling latex cock strap. The buckle is the lockable kind, so the Prison can be locked on. We don't rate this item as a high-security device, since in many (if not most) cases, the man who's wearing it could get it off if he made a concerted effort. However, in most cases, if the lock stays locked, he will not be able to get it back on, so that makes the device "tamper evident." The prison allows the genitals to be totally enclosed and confined, but still vulnerable to stimulation by touch, which will be felt through the rubber. This can make for an intense sensory experience. There is a hole at the end of the pouch which will allow for fluids to flow in and out.

If you measure the girth (distance around) of your whole "package" (the cock and balls) at its widest point when it's soft, that is the best indicator of which size to order.

Small: Height 3.9" Girth 9.5"
Medium: Height 4.4" Girth 10.1"
Large: Height 4.7" Girth 12.0"
X-Large: Height 4.9" Girth 13.0"