Aspen Black Genuine Leather Boot The Aspen boot was designed with a focus on functional and stylish comfort for cold months. Impeccably made from Italian fine leather, these knee-high boots are designed with a pointed toe, anti-slippery sole, and zipper closure on the inner side for a secure fit. Set on a 3.5-inch heel, Aspen Marta is the perfect boot for daytime, evening, and everything in between.