During dives, most carribean divemasters wear what looks like

[mbacarella]

Some kind of UnderArmour t-shirt.

Are they trying to look cool, or are they wearing a specific kind of shirt for some kind of performance benefit? I prefer not to wear a wetsuit when I dive in warm water, but the rest of the divers would prefer I wear clothes, so I think I'm settled on wearing a shirt, but what kind of shirt? Does some other material work better than a cotton t-shirt?

 

[tkdgodess]

it's probably a rash guard or chill guard, or a spf t-shirt instead of coating themselves in sunscreen over and over...

 

[Dirty-Dog]

I don't know exactly what you're describing (the people we've dove with in the Caribean wore either a wetsuit or dive skin) but perhaps you're thinking of a rash guard?
Something like these: Skins & Rash Guards | Skins & Rash Guards at LeisurePro.com

 

[A2thaK]

is it something like this?

 

[Wookie]

is it something like this?

Please, make that a spoiler. There are children.....

 

[jaybombs25]

Most Caribbean DM's / Instructors I know wear fullsuits. Only a couple wear shorties but the majority wear 3 mm fullsuits and quite a few 5 mm because of repetitive diving despite it being in warm water.

 

[Dirty-Dog]

is it something like this?

Can someone pass the eyebleach please?

 

[Skier-Diver]

It's probably a rash guard. I have one that I wear under my wetsuit or under just my BCD if I'm not wearing a suit. The BCD's will rub you raw if you do several days of consecutive diving. The rash guard prevents that and it makes my wetsiut easier to get on and off.

 

[Rhone Man]

If it is not a rash guard, it is probably just a chicken vest for extra warmth.

 

[jnunn04]

If it is not a rash guard, it is probably just a chicken vest for extra warmth.

Chicken vest?