100 lb. gloss text is a heavier paper with a glossy finish that is an economical choice for printing larger posters.
100 lb. gloss cover is a heavyweight paper, similar but not as thick as cardstock, that improves the durability of larger printed pieces.
120 lb. matte cover is a premium, heavyweight paper with significant weight and durability. It has a dull, matte finish.
120 lb. gloss cover is a premium, heavyweight paper that has significant durability and a shiny, glossy finish.