SLIP ON CLEAR SIDE SHIELD THE INSTALLATION NEEDS NO TOOL OR ADDITIONAL PARTS. LIGHTWEIGHT AND CONTOUR DESIGN PROVIDES COMFORTABLE PROTECTION. OUR SS100 SIDE SHIELD IS A CONVENIENT ACCESSORY CONSTRUCTED OF CLEAR SOFT PVC. THE UNIQUE CHANNEL DESIGN OF SS100 ALLOWS EASY INSTALLATION ON A WIDE VARIETY OF PRESCRIPTION EYEWEAR. ONE SIZE FITS MOST *EXCEEDS ANSI Z87.1 HIGH IMPACT REQUIREMENTS.