X-Ray Protective Glasses justable Full Face Mask Open back design for excellent ventilation and comfortAdjustable full face mask with 180-degree protection $1.00 Request a Quote Adjustable Full Face Mask Protection: Full face and frontal head protection with 180-degree coverage. Adjustability: Easily adjusts to different head sizes using an adjustment knob at the rear of the headband. Material: 0.1mm lead equivalent Rayshield® acrylic X-ray protective shield. Frontal Protection: 0.25mm lead equivalent frontal head protection. Ventilation: Open back design for excellent ventilation and comfort.