1. The mouth holes are designed to allow maximum air-flow while still providing complete protection from the wind and cold. This allows water vapor to escape while warming the air you inhale.
2. The eye openings are designed for unobstructed vision and to allow you to wear glasses or goggles.
3. The ear holes allow you to hear clearly while still maintaining total protection from the wind and cold.
4. The neck guard protects your neck from wind and cold without the need for a scarf.

Sizes: Medium, Large, X-Large