When selecting a face mask for scuba diving, what are the two most essential factors to consider?

When selecting a face mask for scuba diving, the most critical factors to consider are fit and seal. A proper fit ensures that the mask contours to the diver's face without leaving gaps, preventing water from entering the mask while underwater. This is vital for maintaining comfort and clarity of vision, as any water that seeps in can create discomfort and distract the diver.

The mask's seal is equally important, as it directly impacts the functionality of the mask. A good seal helps to create a reliable barrier against water intrusion, allowing divers to focus on their underwater experience without the distraction of leaking water. If a mask does not fit well or has an inadequate seal, it can diminish the safety and enjoyment of the dive by requiring frequent adjustments or causing discomfort.

Other factors like comfort, color, design, durability, brand, and price are certainly considerations in choosing a mask, but they are secondary to the essential need for a good fit and reliable seal to ensure an effective and enjoyable diving experience.