firstly i would like to say , that after viewing lots of pics that i am amazed with how realistic these systems can be,excuse my ignorance but i guess before i seen pics of people like colin and sam , i thought hair systems would be totally detectable and it would be possible to detect one from a distance , now that i know that this couldnt be further from the truth, my only concern is how secure these systems are, like whats the odds of them coming off or the hairline lifting up , also can you swim in them ,work out in them, sleep in them, etc, whats the best glues and tapes to insure a good secure fit, i would greatly appreciate some info and tnx for the replies in advance