The jacket, because of its design, is more waterproof than the vest and, if it has an effective tightening system, such as a neoprene band, closes more firmly around the neck. The size must be chosen correctly and should also close with a band. Efficient yes, but less convenient to put on than a vest. The vest though, is more difficult to seal. It is necessary to use models that hold squarely at the collar, with hermetically sealed or double pockets. The seams must also be sealed and fitted with a flap closure.
Breathable three layered system
On a boat, we often undertake short intense periods of effort followed by periods of inaction. It is necessary therefore, that one is able to perspire during the effort and not remain damp the rest of the time, as this may engender a sensation of cold. The new materials permit perspiration to move toward the exterior and keep the body dry. This system, if followed to the letter, functions very well. First layer
