O'Neill Thermo X Long Sleeve Thermal Rash Vest in Black The O'Neill Thermo X Long Sleeve Thermal Rash Vest is a new state-of-the-art rash vest that is perfect for any surfer! The vest is water-repellant and odour resistant as well. The core insulation and Super Low Crew neck make it perfect for putting on under your wetsuit during the winter months. This vest has a UVF of 50 so you can wear it with a pair of board shorts during the summer months.   FEATURES   Maximum core insulation Water Repellency Odour Resistance 4-Way stretch fabric 50+ U.P.F Rash Protection Super Low Crew Neck O'Neill Thermo X Long Sleeve Thermal Rash Vest - Black