Jeffrey Campbell Cognitive Boot in Black. - size 6 (also in 7.5, 8, 8.5, 9, 9.5) Jeffrey Campbell Cognitive Boot in Black. - size 6 (also in 7.5, 8, 8.5, 9, 9.5) Leather upper with rubber sole. Pull-on styling. Pull-tab accents. Heel measures approx 3.5 H Shaft measures approx 11 H. Imported. JCAM-WZ878. COGNITIVE. Step into comfort and fashion this season with these new shoes from Jeffery Campbell. Made with premium leather and a German sole. These pretty babies will keep you coming back for more. Shop the latest in fashion from Jeffrey Campbell