Alaïa 90 Knee Boots — knee-high calfskin boots defined by a distinctive squared toe and a 9 cm leather-covered block heel that subtly slants to elongate the leg. Key attributes: Black | Noir | Calfskin leather | Zip fastening on inner side | Squared toe | Covered block heel slightly slanted at the back | Leather lining, insole and outsole | Dimensions & fit: Heel height: 9 cm | Composition & care: Main material: 100% calfskin leather | Lining: 95% calfskin leather | Secondary material: 5% goatskin leather | Sole: 80% calfskin leather, 20% rubber