SLN 100% polyester webbing sling, it is made of 100% polyester which is a soft low stretch material with quick drying capabilities. Polyester retains much of its strength when wet,  also resists UV light, mildew and abrasion. The safety factor of webbing sling is 4, 5, 6, 7, 8.   Producing Standard: EN 1492-1-2000, ASME B30.9-2006, AS 13531-1997, IRAM5397, JBT8521.1-2007