The BIRKENSTOCK Siena boasts a refined appearance. Crossed straps give the sandal its unique and special look. The Big Buckle version features a large, elegant pin buckle – a striking accent on this otherwise understated sandal. The lining of the semi-exquisite footbed is covered with soft smooth leather and matches the shoe in color. The upper is made from extra thick, oiled nubuck leather.
- Anatomically shaped cork-latex footbed; semi-exquisite
- Upper: oiled nubuck leather
- Footbed lining: smooth leather
- Sole: EVA
- Details: two straps, one with an individually adjustable metal pin buckle; color-coordinated footbed
- “Made in Germany”
Upper material: Natural leather
The natural leather that we use is mostly smooth leather, in some cases tumbled leather. This type of leather has many special characteristics, such as breathability, adaptation to the shape of the foot and durability.
Insole: Natural leather
Natural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material.
Footbed material: Cork
Cork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning.
EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with extremely good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned.