which phenomena could result in the formation of condensation within the interior of the layer which would be detrimental to the insulating properties of the padding in that the condensate would in practice fill cavities or zones which otherwise would be filled with air the metallised layer as well as being elastic and soft thus permits any possible condensation or moisture which may form within the padding to escape therefrom thus contributing to an improvement in the health characteristics of the product another important aspect of the invention is constituted by the fact that the metallised surface layer being composed of metal particles embedded in a synthetic resin has the function of conferring a greater compactness and dimensional stability to the padding layer thus formed making this latter thus more easily workable for example in the production of windcheater jackets and quilting in that any fraying which might otherwise occur in correspondence with the cut edges is significantly reduced because of this the said metallised surface layer is able to facilitate the washing operations on the finished product as well as exerting a definite locking action on the surface fibres allowing the padding to be used with any type of fabric even very light.