Closed protective eye shield can protect your eyes from chemical splash, can prevent saliva, fly dust, pollen, etc. Give your eyes better protection. Comfort: made with a soft, flexible PVC body to ensure proper fit and comfort - fits over most prescription eyewear. Adjustable head belt: The elastic band design to facilitate the fastening of the head circumference. It has wide space and it's suitable for various head circumferences. Polycarbonate lens: clear lens, good visual effect, splash-proof, effective UV blocking Anti-Fog Wide-Vision Lab Safety Goggle,Eye Protection for Classroom Lab, Home, and Workplace Safety.