The Sealhouette spearfishing mask has a silicone mask skirt and strap . 
The internal volume of the mask is minimal, and the distance between lens and eye is reduced. The buckles are low profile and are positioned on the skirt. The mask guarantees a wide field of view. 
The following are the key features of the Sealhouette spearfishing mask:

• Double lens mask 
• Silicone facepiece 
• Reduced distance between lens and eyes 
• Wide field of vision 
• Lightweight