Product Description Material: ABS + plastic frame Visible light perspective: greater than 42% Lens color: gray Specification: square Package Contents: 1 * 3D Glasses Clip 1. Perfect for Prescription Glasses: Wearing two pairs of glasses at the cinema is inconvenient and tiring. These clip-on glasses are very lightweight and cause no discomfort to your head. 2. Easy and Convenient to Use: The glasses can be easily attached to your prescription glasses. You can flip the lenses up and down with your hand while wearing them. 3. Good Quality and Portable: The clip is sturdy and the lens is durable. You can clean them just like your prescription glasses. These are passive 3D glasses that do not require batteries. And each comes with a portable clear plastic case. Fits the bridge of the nose: With a new generation of man-machine technology micro-clip, our 3D clips connect in the same way as the glasses we wear, making our clip and lens highly laminated, so they don't interfere with vision at all. It's light enough and doesn't obstruct your vision; we even feel like we're not wearing clips.