The Sergio Tacchini x Nast Expedition Polar Fleece Top is part of an exclusive collaboration with hip-hop artist A$AP Nast. The sweater is made of warm polar fleece and features a button placket. The contrasting nylon bands, inserts and trim add a retro look, while the embroidered crest patch at the left chest is inspired by Nast's fondness for British soccer hooligan culture.