For physical protection, a Thai boxer wears boxing trunks with a protective cup sewn on inside to prevent injury from kicks and kneeing. As for spiritual protection, Thai boxers believe in all kinds of charms and talismans. That is the reason for wearing lustral thread around the head and rings of charms around the biceps. No woman is allowed to go into the canvas ring for fear that her influence should destroy the strength and skill of the boxers.