This versatile custom vest is cut from smooth merino wool. The finish has a slight luster to it, natural wrinkle resistance, and natural stretch which makes it a great choice. Natural stretch (sometimes described as mechanical stretch) is a woven technique that uses the natural bounce-back of refined wool combined with weaving tension and final finishing of the fabric to obtain the stretch characteristic without using elastic within the composition. The mid-tone shade of navy is a classic one that works well with all kinds of shirting.