Arizona Kids offers the same great support and comfort as the adults classic sandal. Perfect for adventurous kids, the upper is made of skin-friendly and hard-wearing Birko-Flor. The upper can be individually adjusted using two sturdy metal buckles and provides kids feet with protection and grip, even when things get boisterous. These are a Narrow kids fit. Every pair of Birkenstocks is made from the highest quality materials. Birko-Flor Upper / Classic Footbed - Suede Lined Birko-Flor is the Birkenstock trade marked synthetic leather. It is a skin friendly, easy care fabric. Clean with a damp cloth. The essence of all our shoe models is the original BIRKENSTOCK footbed, which is inspired by the natural imprint of a foot in the sand and feels just like walking barefoot. Its anatomical shape ideally supports the natural walking action of your foot. Your feet, joints and back are protected. At the same time, your foot and leg muscles are exercised, and your health and well-being benefit as a result.