The Mizuno Hayate Sweater Vest is made from a fine gauge Merino wool knit that gives the Hayate Sweater the appearance and touch of classic golfwear. The bonded flexible softshell fabric features the impermalite technology for wind protection. Hidden inside is a windproof drop liner to minimize the need for additional outer layers in dry conditions. The Merino Wool WarmaLite fiber yarn recycles escaping body heat creating an insulating layer between body and garment. Available in red, black, blue and gray.