Many people make the mistake of buying thermal protection that is marginal at best and do not enjoy diving as much as they should because they get chilled. Keep the following in mind when choosing a dive suit:
Tropical 1mm jumpsuits or 3mm shorties for warm-blooded divers. Most divers will appreciate full 3mm jumpsuits for deeper diving or extended dive sessions.
5/3mm Jumpsuits for most divers. 5.0mm two piece farmer John/Jane and jacket suits for extended or deeper diving. For diving in lower temperature in this range, consider
adding a 3mm shorty in addition to your jumpsuit.
7/5mm two piece farmer John/Jane and jacket models for extended or deeper diving. (Most major scuba agencies recommend dry suits for diving below these temperatures)
7/5 mm two piece Farmer John/Jane and jacket suit, either Kobalt Pro-Flex¨ or Titanium Toaster¨ models for extended or deeper dives. Extremely long or deep diving may require you to “layer your suit” with additional neoprene accessories such as Titanium hooded vests, or shorties.
Dry suits or 7mm two piece suits only. All dry suits will require proper undergarments and/or layering especially as the temperature drops towards freezing. When diving in 7mm two-piece farmer John/Jane and jacket use additional layering accessories such as; vests and shorties.
Each person should determine what thickness or style will best fit his or her needs based of the recommendations from instructors or local dive store professionals.
If your suit is too warm, you can flood it to cool off, but if you begin with insufficient thermal protection all you can do is shiver or stop diving!