1 Button. This Italy made Super 150's Extra Fine is the Lightest, softest and finest on the planet. Super 150's Wool = You can probably guess !!! Yet, even softer than super 100�s and 120�s. Here you are talking about \"Celebrity Status\" as well as start getting into high-quality. The difference between a Super 150's Wool and a Standard Worsted Wool is that the wool in a Super 150's Series is softer, lighter and of higher quality and lies and drape nicer on the contours of your body. I