Mares X-Tream MaskX Tream Mask The Mares X Tream spearfishing mask has an ultra low volume to minimize mask compensation during the dive . Both the minimalist design and the reduced hydrodynamic profile work together to reduce drag in the water . The new ergonomic buckles have also been redesigned for better hydrodynamics. The distance between lenses and eyes has been reduced, allowing for a large field of view. Featuring a very minimalist hydrodynamic strap, it also