evo.com | O'Neill Rashguards > The O'Neill Thermo X Short Sleeve Surf Tee has you covered for all seasons, offering a little extra insulation for frosty winter riding and coverage for the hazy days of summer. Made with a low cut neck and 4-way stretch fabric for comfort and flexibility underneath your wetsuit, the Thermo X is a must have for serious surfers. Odor Resistance Maximum Base-Layer Insulation 220g 4-Way Stretch Nylon/Spandex with HyperDry Maximum insulation and minimal water absorption. Water Repellency Super Low Neck No interference with wetsuit neck. | O'Neill Thermo X Short Sleeve Surf T-Shirt 2019