BIRKENSTOCK Women White Clogs. The Boston clogs are a true classic that can be easily worn all year round. The sole ensures comfortable and secure support with its two components, an EVA midsole for shock absorption and a non-slip genuine rubber outsole. The upper is made of high-quality and soft natural leather. Spring/summer season. BIRKENSTOCK Women White Low Profile Casual Clogs for spring/summer 060136. Material: Leather and cork.