During the ancient Celtic festival of Samhain, people believed that the veil between the living and the dead thinned, allowing spirits to roam freely. To protect themselves, they wore disguises made from animal skins, bones, and other natural elements, hoping to confuse or ward off any malicious spirits that might come their way. These early "costumes" were not for fun but for survival, blending in with the supernatural world to stay safe.
The practice symbolizes how deeply rooted Halloween is in the human desire to shield oneself from the unknown, a tradition that still subtly echoes today.