Brand new Patagonia ski vest, winter running vest, and versatile outer layer. A roomy size x-small; could easily fit a small as well and possibly a medium. The interior of the vest uses the thermally efficient PrimaLoft Gold Insulation Eco material. This material allows the vest to maintain 98% of its warmth, even if it gets wet. The quilted pattern helps that insulation be as efficient as it can. The outer shell works just as hard as the inner one. The recycled polyester exterior shell resists moisture and wind, helping you stay as warm as you can. With a slightly fitted style, you avoid feeling like a shapeless marshmallow that comes with some puffy jackets. And you won't compromise on warmth when you choose a vest over a full jacket.