The sustainable Bitflex Chelsea boot from Astorflex is designed and developed to be of the highest quality, flexible and easy to wear. Made to last, the Astorflex showcase Italian craftsmanship with modern ways of sustainable thinking and a passion for attention to details and materials. This dark brown Bitflex boot has a vegetable-tanned Italian suede upper and water-based adhesives. The calf leather insole and crepe rubber sole ensure supreme comfort and durability.