Storm Tactical "Heavy Paper" coil bound books are printed on extra heavy duty 90 Pound Index Card Stock paper, in an easy to read size of 5.5" x 8.5" (half of an 8.5" x 11" sheet of paper). * The book uses plastic coils, which have shown to hold up better than metal coils in the field. * These books are coil bound with a polydura hard shell cover, front and rear. * These books can be used with Rite in Rain waterproof pen, sharpie ultra fine point pen, sharpie extra fine point marker, uniball 207 style pen or other smear-proof pen, or pencil. * Storm TacticalTM Reticle Logo on cover.