The Aqua Lung or Aqualung Sphera mask is a low volume mask preferred by freedivers. It has curved plastic lenses that allow it to wrap around the face, resulting in increased field of vision and lower volume. The Sphera mask achieves low volume in a different way than other masks in the ultra low volume micromask class, and as such is likely to provide a waterproof seal for a larger segment of divers that otherwise experience leaking especially under the nose area. However this same curvature of the lenses causes some visual distortion making the Aqua Lung Sphera an acquired taste. The plastic lenses are also sensitive to scratches requiring more care during storage. The silicone skirt is soft and comfortable.
All in all the Aqualung Sphera is not an ideal mask for spearfishing where excellent visual properties and high durability are required. But it has acquired a strong following among freedivers. The newest version of the Sphera mask with silver buckles is available with free shipping from freedivestore.com Aqualung Sphera Mask.