A method for wrapping hygroscopic products includes feeding a succession of products and wrapping each product in wrapping material to define a wrapper for the product, The wrapping includes 1) folding a sheet of wrapping material into a U-shape around a respective product and sealing to each other at least two edges of the sheet of wrapping material along a first, longitudinal sealing line defining a tubular body in which the product is disposed and having a first and a second open end; 2) sealing two portions of the tubular body along second and third sealing lines transverse to the first longitudinal sealing line, thereby enclosing the product in the wrapper; and 3) creating a vacuum in the tubular body before the sealing the portions of the tubular body along at least one between the second and the third sealing lines.