This is the IST Synthesis Scuba Diving Mask with Flexible Auto-Adjust Buckles Features: Plastic injection construction Twin-colored sub frame Flexible buckles auto-adjust to the divers preferred strap angle Folding ability for technical and/or traveling applications By combining CNC and plastic injection construction methods, the Synthesis uses the same aluminium as the Panorama to give the mask its stout base to support the twin-colored sub frame. The flexible buckles auto-adjust to the divers preferred strap angle, not to mention its folding ability for technical and/or traveling applications.