Harry Had A See-Through Cloak

Harry had a see-through cloak, its cloth as clear as air;
And everywhere that Harry went, the cloak he was to wear.
It came with him to Hogsmeade one day, which was against the rule;
It made Ron laugh and Hermione say, “Harry, you‘ll be thrown out of school!”
And so Snape suspected Potter, but couldn’t catch the boy,
And waited by the On-Eyed Witch where he would discern his ploy.
“Why does Harry love the cloak so?” asked Dean over the choir songs;
“Because it was my father's, you know” replied the son of Prongs.