Answer:
As light as a feather, but you canβt hold it for ten minutes.
I have three hundred cattle, with a single nose cord
A slow, solemn square-dance of warriors feinting. One by one they fall, warriors fainting, thirty-two on sixty-four.
A seed am I, three letters make my name. Take away two and I still sound the same.
As a whole, I am both safe and secure. Behead me, I become a place of meeting. Behead me again, I am the partner of ready. Restore me, I become the domain of beasts.
You use it between your head and your toes, the more it works the thinner it grows.