Calf wraps served as practical leg protection for both men and women during the Viking Age, providing warmth and protecting legs from injuries caused by undergrowth during work and everyday life. While men often wore them over their trousers to secure them, women wore them under long dresses. The Birka hooks serve as functional and decorative fasteners at the top of the wraps, preventing them from slipping and lending the historical garment a detailed, high-quality appearance thanks to their authentic design.