Globe-Weis/Pendaflex Poly File Wallet, 3.5-Inch Expansion, Elastic Cord Closure, Letter Size, Blue (84041BL) Acid-free, waterproof and tear-resistant polypropylene material 3-1/2" expansion holds up to 700 sheets of letter-size paper Cloth gusset with sewn edge trim and heavy-duty elastic cord to withstand everyday use