At how effectively it can restrict you. On its face its a quick and dirty form of mummification, for those of us who are too damned lazy to wrap and wrap and wrap and wrap..

Used in addition to a basic wrist and ankles tie, , it can get maddeningly frustrating when you cant open your knees at all, or move your arms away from your body. It also does obstruct your vision some what, the way I use it ( I use both legs as sleeves to double wrap the upper and lower torso. ). Add in a vibrator between those thighs, and you would be surprised at how much some one might look like a worm, or a snake, writhing across a bed, or the floor, or some such...

Dreaming just a bit now, lol
Rav