C-Line Biodegradable Reusable Poly Envelope with String Closure, 1-Inch Gusset, Letter Size, Pack of 24 Envelopes, Assorted Colors (35010) Formulated to biodegrade in landfills Extra large envelope to hold letter-sized documents String closure allows for continuous reuse Great for document storage and inter-departmental use Pack of 24 assorted color envelopes