Another raised a clear bubble helmet and carefully set it down over Ivan's head.

Now they walked with their bubble helmets thrown back.

The wind blew straight down, battering at his bubble helmet.

Pull the bubble helmet over your head, seal it to the neck ring.

He picked up a bubble helmet and locked it on.

It was like a space suit without a backpack or a heavy bubble helmet.

The color splashed across the left side of her bubble helmet was bright pink now.

I started to say no, then looked at her through her bubble helmet.

Within the bubble helmet she was young and pretty, and very black.

They looked up through the bubble helmet into a Kzin's smile.