retaining strap 60 fig4 thereby tightly holding the retaining strap 60 between the serrated edge 25 and the beveled slope 22a of the flange 22 the moveable cover 23 includes a releasing tab 28 to provide for quick release of the retaining strap 60 from the clamp 20 the tab 28 is adjacent to the spring hinge 26 so that when the wearer depresses the tab 28 the spring hinge 26 pivots about the edge 30a of the frame 24 and the serrated edge 25 rises away from the flange 22 and strap 60 thereby allowing the retaining strap 60 to be drawn through the opening to position the protective goggle 50 the wearer depresses the tab 28 of the flap 23 thereby raising the serrated edge 25 of the moveable cover 23 away from the beveled flange 22 the wearer then draws the retaining strap 60 through the opening in the frame 24 between the flange 22 and the serrated edge 25 after the wearer releases the tab 28 the ends of strap 60 are pulled to tension strap 60 while hinge 26 causes the serrated edge 25 to be urged against the strap 60 pressing it against the beveled surface 22a of the beveled flange 22 this bends the strap slightly further increasing the holding force created by the cooperation of the serrated edge 25 and the beveled surface 22a of flange 22 the wearer then pulls the end of the retaining strap 60 away from the face.