O'Neill Reactor-2 3/2mm Back Zip Full Wetsuit

The O'Neill Reactor-2 3/2mm back-zip wetsuit targets the entry into serious water temperature management: water in the 55-65°F range where shorts and a rash guard stop working, but you don't yet need the 4/3 or heavier insulation of cold-season water. The 3/2 thickness means 3mm core insulation with 2mm sleeves and legs for mobility and less restriction.

O'Neill Reactor-2 Back-Zip Wetsuit

Wetsuits work through trapped-water insulation — the neoprene doesn't keep water out, it limits water circulation so body heat warms a thin layer next to skin instead of constantly cycling cold water across your body. The back-zip design is the practical choice for solo entry and exit; front-zip wetsuits are easier to get into but harder to get out of. The thickness specification (3/2) is the shorthand: 3mm thickness in the core where you lose heat fastest, 2mm in the extremities where you need mobility for paddling or swimming. O'Neill quality in neoprene and stitching means this wetsuit actually survives seasons instead of falling apart mid-winter. The Reactor-2 line represents solid performance without the premium price of top-tier models.

• 3/2mm thickness — core insulation, mobile sleeves and legs
• Trapped-water insulation mechanism — keeps you warm without constriction
• Back-zip design — practical for solo entry and exit
• O'Neill neoprene quality — survives multiple seasons
• Targets 55-65°F water and shoulder-season conditions

For surfers and water sports enthusiasts stepping into consistent water activity, this wetsuit handles the temperature range where being cold stops being fun.