And he wasn't wearing sweatpants, he was wearing a pinstriped suit.

Entering into the tomb, they saw a young man sitting on the right side, dressed in a white robe, and they were amazed.

And entering into the sepulchre, they saw a young man sitting on the right side, clothed in a long white garment and they were affrighted.

The same can be true of a man in jeans or a woman in a business suit.