Clarks Coling Boss Shoes Coling Boss is our traditional men's shoe which mixes a timeless toe cap design. Premium touches can be found in the durable TPU leather sole & full leather linings while our Cushion Plus� technology offers the best underfoot cushioning. Perfect for smart formal wear. Outer Black, : Leather Inner Black, : Leather Sole Black, : Mixed Fastening: Lace Standard = Clarks G/ Wide = Clarks H