Display MoreDan and Diving Gecko are right on. I would like to emphasize the plastic freediving fins.
First, freediving fins; these are important because unlike the scuba your boys will need to hold their breath freediving. To assist them they need proper fins and those fins they wear while on scuba will not cut it. Freediving fins will give them the speed without the energy (conserved energy is very important for freediving.
Now to elaborate on the plastic. There will always be a need for plastic fins. No matter if your boys upgrade to carbon fiber, fiberglass, etc. they will still have a use for plastic. Plus, plastic is way cheaper and versatile. I wouldn't really take carbons on the reef, for example. I don't have the money to replace them that often since I push off the bottom and go on caves and such.
As far as Mako goes, if your are getting your information solely from Spearboard your results will be skewed in favor of Mako. They are a sponsor and per the rules there is no bad mouthing allowed. I would never trust Mako with "complicated" or "important" gear, for lack of a better term (i.e., gun). I feel with the reported malfunctions of gear it would be irresponsible for me to suggest them for such gear. For something not as complicated or important (i.e., weight belt, or arguably fins) it's a gamble. I personally have not been satisfied with even the simplest of gear and have vowed to save my money from further disappointment.
I apologize to any Mako supporters. Just one man's opinion, no offense intended.
Unsolicited plug: I have purchased two guns from Mako, both the enclosed track, and the first one was apparently a short production run of American mech reverse trigger handle. Both excellent guns, in my view. I sold the American mech one to some mexican buddies a year ago and they use it every day, sharing it, with no problems. I'm a bit surprised, based on my experience, that there would be issues about Mako quality. Your mileage may vary, of course.
