Stay warm and protected with the O'Neill Thermo X LS Crew. This lightweight 8oz Polypropylene/Spandex layer combines exceptional insulation with rapid moisture-wicking, so you can push your limits longer. Wear it standalone for extra warmth or layer it under your wetsuit for extended comfort in cold water. Built-in UPF 50+ blocks harmful rays while rash protection shields sensitive skin. Slim fit tailoring in sizes XSβXXL ensures a streamlined feel whether you're paddling out solo or layering up.