ENTRY: Most wetsuits have zipper-based openings to allow the user to put them on. One style is a horizontal chest zip, where the wetsuit has a flap that goes over your head to seal it up. The other common style is a back zip, where the user steps into the wetsuit from the back. Back zips are typically easier to get on, while chest zips tend to be more efficient at keeping water out.
THICKNESS: Wetsuit thickness is measured in millimeters. Many wetsuits have thicker panels in the body and thinner panels in the arms and legs. The thicker panels are warmer, while the thinner panels are more flexible. To give you an example, a suit that is 3 millimeters in the body panels and 2 millimeters in the limbs…