The FKM rubber watch strap redefines durability and comfort. Unlike typical rubber straps, FKM rubber is highly resistant to temperature extremes - whether scorching heat or icy cold. But that’s not the only advantage, FKM rubber’s hygienic properties fend off bacteria, sweat, and oil, making it a smart choice for everyday wear. From sweaty workouts to elegant evenings, Tsar Bomba FKM straps have got your back.