Birkenstock Boston BS clogs in premium wool felt—soft, warm, and sustainably crafted for all-day comfort. Featuring the iconic contoured cork-latex footbed with deep heel cup and arch support, this slip-on style offers ergonomic cushioning and natural breathability. The adjustable leather buckle strap ensures a secure, customizable fit, while the durable EVA sole provides lightweight traction and shock absorption. Made with 100% natural wool felt upper (‘棕色羊毛’ as labeled on box), it’s ideal for indoor lounging, cozy winter wear, or casual urban outings. The minimalist design pairs effortlessly with socks, jeans, or wide-leg trousers. Size 38 (EU) corresponds to US 7.5 M/8 W; model number 0160583. Box confirms ‘Boston BS’ and ‘棕色羊毛’ (Brown Wool), indicating the classic unisex silhouette in a heathered gray-brown tone. Perfect for fall/winter seasons, these clogs blend German craftsmanship with modern Scandinavian-inspired simplicity.