It's one of the most significant events that happens at the chapel, and according to the royal family website, "includes The King, who is Sovereign of the Garter, several senior Members of the Royal Family, and twenty-four knights chosen in recognition of their work." "Knights of the Garter are chosen personally by the Sovereign to honour those who have held public office, who have contributed in a particular way to national life, or who have served the Sovereign personally." Last year, due to her cancer diagnosis, the Princess of Wales wasn't able to attend the important event, but she made a triumphant return this year, after sharing with the public that she's in remission in January
The red, blue, and gold color scheme stays close to the original, but the outfit brings it into a more polished form
Mid weight cotton
It may have been named after the Persian town of Juwakan, or it may have been named after a game of polo, indicating the garment resembled a polo jacket, a short coat with narrow sleeves