Israel wanted a King. They wanted to be like the other nations. So God allowed them to have what they wanted even though it was a rejection of Him.
Samuel looked at Jesse's son, Eliab, because he was tall and handsome and "looked like a king."
But the Lord said to Samuel, "Do not look at his appearance or at the height of his stature, because I have rejected him; for God sees not as man sees, for man looks at the outward appearance, but the Lord looks at the heart." (1 Samuel 16:7 NASB)
Many times in our lives, we perceive people and judge their character based on their appearance.
And many times people dress a certain way hoping to look older, younger, smarter, thinner, more athletic and so on.
What does your dress say about you? What does your appearance say about your heart of God?