O'Neill Rash Vests - O'Neill Hyperfreak Tank Rash Vest - Black/Lunar :: Men > Rash Vests. Boardshort Connector: YesFlatloc Stitched Seams: Breathable and comfortable constructionUV Protection: UPF 50+Technobutter Neoprene: 20% lighter. 30% less water absorption with quick\n dry propertiesInsulation: 0.5mm core insulation. Also provides rib protectionStrategic Seamless Paddle Zones: 4 way stretch with anatomically shaped\n panels for more efficient movement Size: Small.