The women's slave sandals Fenice | Marlin Factory win over with their slender straps that add a touch of femininity to the sandal. The sandal features an adjustable buckle strap that wraps around the ankle leaving the heel completely free. However, this ensures optimal support and comfort despite the delicate lines of the sandal. The upper is in particularly thick, oiled and seamless processed leather. Upper: Cowhide. Insole: Cowhide. Sole: Bonded leather. Details: Strap with adjustable buckle. Colour: Black. Made in Italy.