‘Arizona Birko’ sandals from Birkenstock. The sandals comprise Birkenstock’s iconic two-strap style featuring adjustable straps with copper-tone buckles. ‘Arizona Birko’s are constructed with a ‘Birko-Flor’ upper, a material developed by Birkenstock as an alternative to leather. The soft textured upper is finished with a durable and smooth surface. The label\'s trademark contoured cork and latex footbed is set upon a shock absorbing EVA sole that offers both comfort and foot support. Upper: Birko-Flor (Acrylic and Polyamide Felt Fibres). Lining: Suede. Sole: EVA Rubber.