The Spartacus thigh harness is an item I added to my collection after deciding that I wasn't terribly impressed with the range of mens harnesses available on the sex toy site that I often bought from at the time.

The selection of cheap hollowed out harness and dildo kits that seemed far too rigid and looked more like novelty items just didn't inspire me. Then I spotted the Spartacus harness designed to be worn on the thigh and made of leather, it's an o-ring harness which can with used with many dildos on the market, that is any that have the o-ring compatible flared base. I already own plenty of them that I wore on my own strap-ons. I decided forget cheap hollowed dildos, a simply designed but high quality thigh harness it would be.

Being made of leather, the outer part of this harness is water resistant and sturdy, everything that a harness needs to be, easily wiped clean and able to endure even the most passionate sessions.

The inside of the harness is suede material and feels wonderfully comfortable against the skin. The leather is also soft, so soft that you might start to underestimate its strength but it soon proves itself with several energetic uses.

The O-ring that comes with this harness is made of rubber and has a diameter of one and a half inches, so will accommodate an average size dildo. I like to use Tantus dildos with mine and find them to be a perfect match. Larger O-rings can be bought separately if you are looking to use toys that are a bigger than average.
The o-ring is kept in place by two steel snaps that are easily opened but not likely to come open by themselves.

The strap is long and adjustable, accommodating to thighs large and small (13" to 28") with nothing but a couple of swift movements needed to secure it within its buckle. Once tightened it is good to go. I have never found the need to fix or adjust once secured in place!