The Bison Black Shell Cordovan Strop is handcrafted with the finest American leather, satin nickel hardware and 100% cotton linen canvas to remove moisture. With a 2.5â? by 18â? stropping area, you have plenty of room to work with while ensuring your straight razor is as sharp as possible, giving you the smoothest shave every time. Designed to improve the lifespan of your straight razor, as well as the quality of your shave.