Fetish Bed Restraint System Restraint Bar Sex Adjustable Straps for Male Female Couples Definitely strong, easy to set up, and comfortable. Straps made from heavy-duty Nylon for comfortable bondage. Size fits single to king size beds for fun anywhere you desire. The buckles is extremely strong and will hold even the strongest partners so security should not be a concern. A non-intimidating BDSM set for exploring your Dominant (or submissive) side.