Plastic frame, lightweight and provides comfortable wearing experience. Unisex Patented Design Fits Most Face Shapes But Won't Fit Most Glasses. Keep the glasses clean. Suitable for all kitchens and sensitive eyes. The onion cutting goggles feature a polycarbonate frame and lens with rubber tips for optimal comfort and durability. The frame has a foam around the eye area that keeps vapors out by forming a very tight area while still being comfortable.