Answer:
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.
Slayer of regrets, old and new, sought by many, found by few.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
What is up thatβs also down? Whatβs a smile and a frown?
Used left or right, I get to travel over cobblestone or gravel. Used up, I vie for sweet success, used down, I cause men great duress.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?