- Birkenstock x Fear Of God couple's Birkenstock slippers. This pair of slippers is named after the famous "Los Feliz" community in Los Angeles and is inspired by the unique hillside enclave in the area. It not only combines the "relaxation" and "high mobility" advocated by FOG "Sexy" qualities, while also incorporating Birkenstock's iconic pure silhouette. Upper: calfskin suede Sole: cork midsole and translucent rubber backing Size: 35-45,