How long you could wear without de and reataching depends on your skin and on the glue you use. I use a medium strong glue and this glue is able to hold 3-4 weeks, but after 2 weeks i want to clean my head. The strongest that i know could hold 5 weeks, but thats too nasty in my opinion, 2 weeks are a good time. I dont like the daily ataching process, i like to atach it on one afternoon and then i dont care for the next 2 weeks (maybe i have to reatach the edges after some days, but beside that it is no Prob.)

Btw i am 26.

Photo from me you could find here http://www.forum.toplace.com/showthread.php?tid=3955