3) Wetsuit Thickness
Wetsuit thickness affects both warmth and flexibility and is measured in millimeters or “mm” for short. You will often see wetsuits listed with numbers like 3/2 or 4/3 in the title but “mm” or millimeters is nowhere in sight. This is the industry standard and it is safe to assume that numbers like 4/3 refer to the thickness of the suit. So when a wetsuit is referred to as a 4/3, this means it is 4mm in certain areas and 3mm in others. It may not be clear exactly which part of the suit is what thickness, but generally you will find the body to be the thickest, then the legs a little thinner, and the arms will generally be the thinnest to maximize flexibility.