Wetsuit thickness is measured in millimeters and the thickness impacts both flexibility and warmth. On our site, you will see everything from 1mm, 2mm, all the way up to 7mm. Some suits even have two or more different thicknesses on the suit such as a 3/2, 4/3, or 5/4/3 and other variations. The first number represents thickness in the torso area, and the second number in the flex points and extremities. Thinner neoprene is used at the flex points and extremities to increase flexibility. As a rule of thumb, thickness increases warmth and decreases flexibility. However, you will not notice a huge difference in flexibility going from a 3/2 to a 4/3, but you will notice the added warmth!
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