Genesis 3:7 Then the eyes of both of them were opened, and they knew that they were naked; and they sewed fig leaves together and made themselves coverings.
This is a perfect picture of how men attempt to cover their sin. They used fig leaves! Lol. Very itchy leaves when put on skin. Our attempts to cover our sin is futile. It reminds me of when my daughter & I would play hide and seek, which isnt sin, she was 2 yrs old or so and would hide behind the curtains, which did not drap down to the floor, which in turn exposed her feet. She couldnt see me and thus she was hiding good. I acted as though I couldnt find her. Now God sees everything we do. He saw their attempt and made them soft lamb skins after the sacrifice for their sin.
Gen 3:21 Also for Adam and his wife the LORD God made tunics of skin, and clothed them.
This is a much better covering and the only one acceptable to God. There must be a sacrifice for sin.