Worn once and in excellent condition! Swapped for one that fit my cheekbones better. The M-212 Ceos is a low-profile low volume two window mask that features the newly developed and revolutionary Freedom Technology delivering superior fit, comfort and performance. The Ceos is one of the first next generation TUSA masks offering this innovative new technology combined with superior design, build quality, materials and frame construction. FREEDOM TECHNOLOGY Freedom Technology is a set of technologies to enhance fit and performance exclusive to TUSA. Freedom model masks feature a dimpled skirt surface with varied silicone thicknesses and stability ridges in addition to a proprietary low-friction skirt surface on the fitting line. 3D MASK STRAP TUSA’s patented 3D Strap is a true three-dimensional design that snugly fits against the head’s natural curvature. The 3D strap offers unprecedented comfort and fit, unlike standard flat mask straps. QUICK-ADJUST BUCKLE SYSTEM The Quick-Adjust Buckle System incorporates a newly-designed low-profile buckle. The result is a compact, lightweight, technologically advanced mask design that can be easily and quickly adjusted for a perfect fit. ROUND EDGE SKIRT TUSA's Round Edge Skirt features a proprietary round edge cross-sectionally shaped skirt. This rounded edge results in a soft fit that suppresses pressure and reduces creasing left on the face. The "planar fit, instead of linear fit" silicone skirt maintains great fit and comfort.