Angle for a raise or promotion in the Indigo by Clarks Charlie Brogue oxford. This women's lace-up shoe is a dead ringer for a classic menswear style, its glossy leather upper accented with traditional wingtip details. A leather lining manages moisture as an extra-cushy footbed keeps you comfortable when on foot. The Indigo by Clarks Charlie Brogue oxford flat shoe has a light-texture rubber sole to carry you in complete confidence.leather. Rubber sole. Heel measures approximately 0.75" Approx. 34'' Heel height. Five-eye lace closure. Generously cushioned footbed. Leather lining. Leather upper.