The year passes and Sir Gawain rides off to the Green Chapel but stops at a castle along the way. There, he encounters a lord and his wife. The wife gives him artifacts and attempts to seduce him. He denies everything from her except an invincibility sash.
"For the man who goes to battle in this green lace... nothing on earth, however uncanny, can kill him.” (225-226)
On New Year's Day, Sir Gawain finds the Green Knight. After some taunting from the Green Knight, Sir Gawain receives the blow, but the sash keeps him safe.
“He raises that ax up lightly and flashes it down, And that blinding bit bites in at the knight’s bare neck (289-295)
“At that, the Green Knight laughed, saying graciously, “Whatever harm I’ve had, I hold it amended... For the cloth is as green as my gown. Sir Gawain, think On this when you go forth among great princes; (366-374)
The Green Knight says to him that he has never met a more pure and righteous knight. He explains,”That sash you wear by your scabbard belongs to me; / My own wife gave it to you, as I ought to know. /... / It was I who sent her to test you. I’m convinced / You’re the finest man that ever walked this earth.”