BOSS Nitan Trainers In Medium Grey. Synthetic uppers which feature darker grey suede trims and a lace fastening. The signature BOSS logo is debossed at the top of the leather tongue with a small black logo printed on the outstep. The cream heel panel features the signature BOSS embroidered stripes in black white and beige. A white rubber textured midsole with a black toe guard and branded rubber undersole..