Material is Premium PU Leather with Rubber Anti Slip at bottom of shoes and soft inner sole. Shoes are available in up to baby foot length sizes: 10.5cm (0-6 months), 11.5cm (6-12 month)s and 12.5cm (12-18 months) Example: If Baby foot length is up to 10.5 cm then please choose size 6-12 Months. AFTER PURCHASE PLEASE CONTACT US IN THE FIRST INSTANCE IF YOU HAVE ANY ISSUES. WE WILL BE HAPPY TO RESOLVE ANY ISSUES IN THE FIRST INSTANCE THANK YOU