Brand - Thom Browne. SKU - FJQ001A-00535-055. Color - Light Grey. Thom Browne Light Grey 4-Bar Engineered Track Pants.These sweatpants are crafted from soft loopback cotton, and feature an elasticated drawstring waist, two side pockets, elasticated cuffs and Thom Browne's signature four bar stripe and tricolour grosgrain tab.