Our white polypropylene fabric is made of 100% non-woven polypropylene k cloth. This material is commonly used as the outer shell for pillow forms and bolsters, as well as aisle runners and wall covers. This non-woven material is great for masks and hazard suits. Tearing strength in the warp: 40N. Tearing strength in the weft: 55N. Hydrostatic pressure: 290mmH2O. Breathability: 80mm/s.