Globe-Weis/Pendaflex Globalfile Poly Top-Opening Envelopes, Letter Size, String Closure, 1-Inch Expansion, Assorted Colors, Box of 12 (84170) Top-opening poly envelope Durable poly is waterproof and tear-resistant Expands up to 1 to hold larger quantities of letter-sized documents String and button closure 12 poly envelopes in assorted bright colors