Materials listed include generic paper and wood cellulose, plus specific pulps such as BEK (Bleached Eucalyptus Kraft Pulp) and NBSK (Northern Bleached Softwood Kraft).
Toilet paper is described as thicker and stronger per sheet (one listing notes it is 3x thicker/stronger). Several facial tissues are described as durable, stronger when wet, or designed to hold up better than regular tissues.