BIRKENSTOCK. 1001 042 1. ISLAY BLACK LEATHER TIE. A natural rolling motion for a relaxed gait with the Islay classic lace-up low shoe from BIRKENSTOCK. This sporty and versatile model is made of high-quality lightly oiled and exceptionally hard-wearing pull-up leather. Subtle contrasting seams accentuate the profile of the rounded slightly asymmetrical last which corresponds to the natural form of the foot. Removable anatomically shaped cork-latex footbed.