Answer:
What is full of holes, but can still hold a lot of water?
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
Look into my face and I'm everybody. Scratch my back and I'm nobody.
Runs smoother than any rhyme, loves to fall but cannot climb.
What is pronounced like one letter, written with three letters. And belongs to all animals?
People take me on walks and I run and have fun. What am I?