younggun.. you will have no issues with your system de-bonding during activities such as surfing/exposure to water....provided you use a strong tape and /or strong glue......you can also apply a line of glue along the centre of your scalp just to provide a bit of extra hold.... your system hair will suffer though, from exposure to salt water etc. as you would expect..... I can assure you, I can totally understand how a person might imagine the `picture`you have painted of you going under a wave with a full head of hair and emerging from it half-bald.......that will NOT happen with the correct glues... the strongest glues are EXTREMELY strong...almost like super-glue.... obviously prolonged exposure to moisture will shorten the `life` of a particular bond..you`ll get very very relaxed with it quickly ..you`ll know when an attachment needs to be re -done, but you will not suffer a sudden de-bond when surfing etc. Paul.