Various items for Kaṭhina It is quite common in Myanmar to offer robes at the end of the Rainy Season (vassa) in a ceremony called Kaṭhina. How long do monk’s robes last? A monk normally has a set of three robes; a lower robe, an upper robe and a double robe sometimes referred to as the outer robe. During Kaṭhina, a set of robes are offered, but usually just the lower and upper robes since the double robe or outer robe lasts a long time.