Test your own tolerance. See how long you can comfortably wear them before you start feeling pain, your nipples get cold, or there are ay other bizarre effects (pain as in other than the obvious that ou are wearing clamps) and that is your limit. Fox has days he can wear them for an hour or more, others he cant for more than 5 minutes.
HA!!! Yeah, that's about how I feel about those little suckers (glares at a certain poster here who gave them to my Master)...
I think the longest I've had them on has been about 10 minutes before I almost passed out, lol. I've worn other clamps a lot longer but clovers are just...wow. [&:]