Smead Tyvek-Lined Gusset End-Tab File Pockets, Legal Size, 5 1/4" Expansion, Manila, Box Of 10 - Built with straight-cut double-ply tabs, Smead Tyvek-lined gusset end-tab file pockets are made to withstand the rigors of your office's filing system. Each gusset is lined with Tyvek for an extra dose of strength.