The Bible does not specify what God used to clothe Adam and Eve with. Jewish commentary mentions the idea that the Nachash molted and that God used this to cover their nakedness.
"Also for Adam and his wife the LORD God made tunics of skin, and clothed them" (Genesis 3:21).
The Hebrew word translated as "skin" is 'owr which means hide or leather. The same word refers to the hides used to make a covering for the tabernacle (Exodus 26:14) and the skin of a bull leftover from sacrifices (Exodus 29:14). It is not used for the feathers of birds as you are inferring. That Hebrew word would have been nowtsah or 'ebrah.
Sorry, but you are wrong on both points. It is amazing the lengths people will go to avoid an answer with which they disagree.