This is an authentic Y's item, but it's quite old. The blue-green part is cotton, and the thin khaki part is knitted. There is some pilling. It can be worn in various ways, not just in summer; you could pair it with a turtleneck now, so it can be worn in all seasons except winter. Price is negotiable. - Brand: Y's - Color: Mint Green - Material: 50% Cotton, 50% Polyester - Size: 3