Expositor's Bible Commentary Commentary Mark 9:3

"and his garments became glistering, exceeding white, so as no fuller on earth can whiten them." — Mark 9:3 (ASV)

It is difficult to know exactly what happened at the Transfiguration. Jesus’ clothes became “dazzling white.” His appearnce was temporarily changed into that of a heavenly being (cf. Revelation 1:13–14).