A staple of their collection every winter, Stone Island presents a new version of its Wool Ice Jacket that blends the wool outer with a thermo sensitive yarn.
What does that do? Well, the yarn is embedded with thousands of micro-encapsulated pigments which change the color of the jacket according to the outside temperature. When the mercury drops, the jacket darkens. Pretty crazy right? It also features a water and wind-resistant exterior, a removable quilted hood, and enough wool to keep you warm on frosty evenings.