The super-lightweight CK1 series provides near total eye orbital seal and features flexible bayonet temples and universal nosebridge, ensuring compliance and comfort for a variety of wearers. Temple is notched at the end to accommodate a break away cord.
High velocity impact safety glass test method is performed by shooting a 1/4" steel ball at a speed of 150 feet per second aimed at the center of the lens. The result is a Pass or Fail which determines that a lens must not chip, break, or crack and it must maintain its original position in the frame.