RIFFE's Mantis mask is made of heat treated silicone rubber to reduce fogging. 
Durable Nylon frame for superior strength. The plastic and silicone 
mold are of the highest quality and is evident when handling the mask.

Recommended for Medium to Wide faces

2 Tempered glass lens options:
• CLEAR 
   standard
• AMBER
   for increased light, higher contrast    
   and better separation in low visibility

• Heat treated silicone rubber
• Durable nylon frame
• GoPro mount capability
• Clear or Amber lenses available

This is also the only mask from Riffe--and one of the only masks in the whole market--that has a bracket available to attach your GoPro! Never miss a moment. See the mount here