Classic Snowjogger Star winter boots by Rubber Duck. The winter boots have a lightweight design. They have a warm padding, teddy fleece lining, a velcro closure at the back, suede detailing at the front and a grippy rubber outsole. – Water-repellent.– Upper: Leather, Other Materials– Lining: Textiles– Sole: Other Materials.– Please note that when you purchase shoes for your child, you should select a size that is 1.5 cm larger than your child's foot. Wellies and boots should be up to 2 cm larger, for extra socks and insoles.Size Guide (Insole): 24 = 159 mm 25 = 166 mm 26 = 172 mm 27 = 179 mm 28 = 184 mm 29 = 189 mm 30 = 197 mm 31 = 205 mm 32 = 215 mm 33 = 219 mm 34 = 227 mm 35 = 233 mm