The Spyder spearfishing mask has double lens and low volume . 
The Spyder goggle features a soft, mesh-like rubber nosepad and a secure grip to properly position the mask on your face. The skirt features original grooves with a unique hydrodynamic shape for reducing drag while in the water. The unique side knobs and a raised grip on the nose facilitate compensation. Here are the main features of the Spyder spearfishing mask:

• Reduced distance between lens and eyes 
• Minimum internal volume
• Extremely wide field of vision 
• Anatomical facepiece 
• Lightweight 
• Matte finish with anti-reflective properties 
• Hydrodynamic profile for reducing water resistance 
• Mask strap with ergonomic buckles for effortless use