The girdle is quite a controversial symbol. On the one hand, Sir Gawain, the main character of the book, considers the green sash as an embodiment of honor. He believes it is endowed to him as survival by Lady Bertilak. On the other hand, Gawain wore it as a sign of his failure and sins.
Detailed answer:
The situation alludes to the narrative of Sir Gawain and his encounter with the Green Knight. Sir Gawain is enthusiastically looking for the Green Chapel when he suddenly comes across the Green Knight. He chooses to stay at the castle of a nearby ruler who offered him a game. According to the agreement, the host would give Gawain what he had gotten that day. Meanwhile, Gawain ought to have given him all that he had won that day.
On the last day of his stay, the Lord’s wife, Lady Bertilak, gifts Gawain the green belt. She believes that her present will make him healthy and safe. Moreover, she reveals that the sash would be valuable in the circumstances that he needed to endure the fight with the Green Knight. He concealed the belt from the ruler as he dreaded the results. Along these lines, Gawain breaks his guarantee, and this filled in as a token of his powerlessness to keep up courageous standards. That is the reason he chose to wear it as a token of his disappointment.
After a fight with the Green Knight, who ended up being the Lord Gawain remained with, he recounts his trial’s narrative to his knights. He likewise discloses to them the significance of the green girdle. They giggled, yet concurred and offered to begin wearing the belt for him. Alongside, for quite a long time, it has been viewed as an image of honor and power.