Close fitting soft rubber which easy to put on. Once on it can give a sense of sensory deprivation, especially if you cover the eyes.
Breathing is restricted slightly while wearing and can be cut off completely by placing a hand over the front vent.
Lightweight and comfortable to wear, but definitely a sleazy experience.
As a guide, sizes are based on the size of your forehead:
Small : 54 - 55cm
Medium : 56 - 57cm
Large : 58 - 59cm
NB: Hose and Filter are not included. Available separately.