Outside: Natural leather - free of formaldehyde and azo dyes
Lining: Natural leather - free of chrome, formaldehyde and azo dyes
Sole: 4 mm light flat Vibram® Superflex
Size chart:
25/26 - usable inner length 16.4-16.7 cm - width 6.7 cm
27 - usable inner length 17.3-17.6 cm - width 6.9 cm
28/29 - usable inner length 18.2 - 18.5 cm - width 7.1 cm
30 - usable inner length 19.2 - 19.5 cm - width 7.3 cm