Perfect for cold winter days! The Upsalla model from BIRKENSTOCK is a sober boot with a warm lining. The buckle at the end of the shaft adds a touch of originality. The upper is made of particularly soft suede leather that drapes over the foot like a second skin. Anatomical footbed in cork and latex, removable. Upper: suede leather lined with lambskin fur. Insole: natural leather. Outsole: lightweight insole made of synthetic materials. "Made in Germany" footbed. Upper material: Suede leather. Suede leather is a suede with a sanded, rough surface. Suede leather has a soft, velvety surface that feels pleasant against the skin. It is also highly moisture-absorbent. Suede leather is naturally soft and flexible. Its stability is not the same as that of smooth leather, and differs according to the skin chosen. These are not material or production defects. Insole: Lambskin fur. Shearling is a soft, high-quality sheep or lamb fur. This material is warm and breathable and, thanks to its pro...