Solve the riddle:
My first is in some but not in all.
My second is into but not in tall.
My third in little but no in big.
My fourth in port but not in pig.
My whole is made in nature’s way.
For clothing, rugs used every day.
What am I?

Below you will find a hint and the correct answer to the riddle.
Little hint:
Show Hint
Hint: S**k.
Right answer:
Show answer
Answer: Silk.