One Innovation in tradition.One come in the wake of the successful Extreme mask, the mask most frequently sold in the history of Seac. The anatomic skirt affords it an extraordinary capacity to adapt to various shapes of the face and its small size make it the perfect all-purpose mask. Frame: Polycarbonate Skirt: hypoallergenic liquid silicone Strap: Silicone Lenses: tempered glass Optical lenses: from -1.0 to - 6.0 Packaging: rigid transparent case included