Wetsuit — What It Is and Why It Matters

A wetsuit is a form-fitting neoprene garment that provides thermal insulation for scuba divers by trapping a thin layer of water between the suit and the skin. Body heat warms this water layer, which then acts as insulation against the surrounding cold water. Wetsuits range from 1mm shorties for tropical waters to 7mm full suits with hoods for cold-water diving.

Proper fit is critical — a wetsuit that is too loose allows constant water exchange (flushing), eliminating the warming effect. Modern wetsuits use sealed seams, smooth-skin neoprene panels, and chest zippers to minimize water entry. Wetsuit thickness and coverage should be matched to the water temperature you are diving in.