Aqua Lung Mission MaskThe Mission mask sports a frameless design and wide angle view. Our Advanced Fit Technology uses differently textured bands of silicone around the skirt to form a superior seal. The buckles are designed to be folded flat to fit easily into a pocket, making it an ideal back up mask. Available in regular and midi sizes to fit every face shape. Features: Bio mimicking Lens Shape. Unique, bio inspired teardrop shape delivers improved peripheral vision.