Cressi Ocean Spearfishing & Diving Mask Features New evolution of the extremely imitated concept Big Eyes, now applied through an advanced assembly system that achieves a minimum thickness frame (6 mm) and diminishes remarkably the mask's weight to 175 g with strap included. The frame doesn't need a circle to fix the glasses that increased the thickness of the mask, but it's the principal case itself to round and press the skirt over the glasses assembling the mask. The reduced frame and skirt's structure of flat adaptation allow a great approach of the glasses to the eyes without issues of contact with the frame. So, the intern volume is reduced to the minimum and all frame vision is eliminated from the inside. 15º inclined and extended glasses over the cheeks increase the inferior visibility more than 30% regarding the one of a traditional mask, while the superior and side visibility are increased to the limit that allows the frame's thickness: total vision -5% in superior visibility and total vision -10% in side visibility. Particularly studied structural rigidity of the central bridge to avoid losing the plane of the glasses due to an excess of tension of the strap that could cause optical distortions. Ocean incorporates completely pivoting belts in all directions and joined to the frame through a flexible and unbreakable elastomer. The tension of the strap acts directly over the frame, maintaining the mask's stability and getting closer the glass to the eyes at the highest level. Excellent mask for snorkeling, diving and apnea. Technical features: Double glass mask Materials: liquid silicone, technopolymers and tempered glass Tilting belts of immediate regulation Internal volume: 135 cm3 Frame dimensions: 163 x 91 mm Weight (strap included): 175 g Recommended Use : Freediving & Spearfishing