Store hundreds of pages in one convenient, secure place. Super-strong redrope wallets are designed for the most active projects. Built to last with extra-thick, 24 pt. front and back covers, rip-proof TyvekÂ® lined gussets and extra long 19 1/2" flap with extra-thick elastic cord for added security. TyvekÂ® tear-resistant strip on inside back cover protects against tearing along critical stress points. Soil-resistant Letha ToneÂ® covers.