Jeffery Campbell The Coltrane Boot in Black Leather. These washed black leather Coltrane boots from Jeffrey Campbell feature a pull tab at the rear, two buckle fastening straps with silver-tone buckles. These boots have a round toe, a white platform sole and a chunky heel. A definite winter to summer transitional boots Heel: approximately 2" (6cm) with approximately 1.5" (3cm) platform. 100% leather.