3D Red/Cyan Pro-Ana (TM) Anaglyph Cardboard Glasses - 100 Pair FOLDED - White Frame - High Quality 100 3D Glasses cardboard red and cyan glasses - folded each in a protective sleeve Red and Cyan glasses are for anaglyph movies - photographs (anaglyph) TV and print images Easy to use and no bother about folding them. The clear sleeve is reusable.