Answer:
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
What flies around all day but never goes anywhere?
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
What has thirteen hearts But no body or soul?
Take one out and scratch my head, I am now black but once was red.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?