smerc
It was mentioned here before. It was really the first thing that came to mind when thinking of comfortable clamping.
Yeah I've described a type of that several times myself. -- It seems more complicated in getting the tubular form of the
sleeve to go all the way to the bottom of the base where the clamps work the best, so I take a section of the
sleeve such as pictured above and make one vertical slit in it .. this way it can be wrapped easily around the very bottom of the base, overlapping itself slightly, and the clamp applied over it to keep it from slipping apart.
(The overlapped ends being underneath at the balls seems the easiest way to apply, and if it ever slips off of itself at the bottom, it's still doing its full cushioning on the top at the nerves.)
And when done like this, because it's stretchy/elastic, it helps not only to cushion the clamp but also applies some restrictive force of its own as well .. like a light
cock ring .. extra constriction that it doesn't apply when used as a regular
sleeve.
Every
sleeve I've done this to have all been up to the task ... for stretchability .. but all of those variously have been from Monkeybone's products, so cannot super-vouch that every
sleeve out there from every maker is up to it.