50 Pairs of Red/Cyan Cardboard 3D Glasses - Folded in Protective Sleeve 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 These lenses provide a better anaglyph 3D experience than most plastic glasses Easy to use and no bother about folding them.