Rite in the Rain Weatherproof Index Card Wallet: Black CORDURA Fabric Cover, 25 Gray 3" x 5" Index Cards (No. C991B) Repels water, sweat, grease, and mud Tough Cardura fabric with Velcro closure Fits 3 index cards and 1 pen (outside), 25 index cards (inside) Internal storage pocket and external storage: corner grip straps and pen loop Use Pencil or all-weather pen (no gels or water-based inks)