Literally, the term indicates the zuava trousers, short knees, worn in the socks, typical mountaineering clothing. Since these pants were originally made of woven fabrics, they ended up naming the fabrics fabricated with fancied yarns, resulting in buttoned buttons, that is, small wicker woolen balls. At present fabrics with this effect, both combed and carded, are manufactured in various weights, so they are used, besides for trousers, for the dressing of dresses, jackets, coats etc. Of sporting tone. When the buttons instead of being of the same color as the bottom are multicoloured, the fabric takes the proper name of "donegal". These fabrics are similar to tweed, with which they are often confused.