The Smith Frontier goggles enhance your view of the whole mountain. Their Airflow lens technology maintains active ventilation through the best and worst conditions for fog-free visibility. Their modern frame and medium fit combine with a low-profile design for a wide range of faces, and they have full helmet compatibility.Cylindrical Carbonic-x lens for clarity, impact resistance and improved airflow. Fog-X anti-fog inner lens for fog-free performance. Dual-slide strap for easy size adjustment Ultra-wide silicone-backed strap stays put. Single-layer compression-molded face foam for low-profile, comfortable fit. Responsive Fit frame adjusts to your face for a precise, comfortable fit Medium fit; Includes a goggle bag.