The O'Neill Thermo-X hooded neoprene vest is a simple way to make any wetsuit warmer. 
Features:
• 220g Nylon/Spandex with HyperDry for maximum insulation and minimal water absorption
• Maximum core insulation
• Water repellency, odor resistance
• 4-Way stretch fabric
• Boardshort connector
• Rash protection
• Strategic Seamless Paddle Zones
• 1mm Neoprene Hood