Genesis 2: 25: And they were both naked, the man and his wife, and were not ashamed.
Adam and his wife were covered by the Glory of God before the Fall, but when they fell, then the Glory left them and they realized their nakedness. This is established by looking at Matthew 6: 28 – 29: And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. The animal kingdom has a covering that comes from within. A sheep has wool, a cat has fur, a cow has hair, a fish has scales etcetera, but fallen man must make garments to cover his body because the Glory that once covered him was lost.
When Jesus was crucified and became sin for us, He hung on the cross naked, because when Adam fell and the Glory left him, then Adam was left in an uncovered naked state. Adam tried to cover his nakedness with fig leaves (Genesis 3: 7), but God gave him bloody lambskins as a substitute for the original Glory that arrayed him (Genesis 3: 21). Jesus was wrapped in graveclothes and put in a tomb, but when He resurrected, the graveclothes remained in the tomb (John 20: 4 – 7) and Jesus appeared in His glorified body to His disciples fully clothed. When Jesus is seen in Heaven in the Book of Revelation, He is clothed (Revelation 1: 13; Revelation 19: 13), and when the prophet saw the saints beyond the Curtain of Time, they were wearing white robes. When the Bride is raptured and Her body is glorified, She will be robed with the same Glory that Adam and his wife had before they fell.