At Hammock World we use the best industrial quality, multi-filament nylon fibre available, not 'polypropylene' for the manufacture of our hammocks, that's why we can offer a genuine 5 year outdoor guarantee on all our 'All Weather' Hammocks!  

CAUTION - Most nylon hammocks are actually 'polypropylene' hammocks, a less expensive synthetic alternative, but these hammocks are still marketed as 'nylon hammocks'.  If you want your hammock to last outdoors, our experience has shown that polypropylene is not a reliable fibre for the manufacture of hammocks. Polypropylene, commonly known as 'polyprop', will not withstand the harsh outdoor conditions experienced in New Zealand, as well as nylon. Polypropylene is not as strong as nylon. It is also affected by sunlight deterioration more than any other synthetic or natural rope fibre. As a consequence of these lesser qualities, polyprop cord is the least suitable fibre for the manufacture of 'outdoor hammocks' - www.lehighgroup.com/fiber.htm 

Nylon is an excellent synthetic fiber which is used extensively throughout the marine environment where it withstands sun, salt and water extremely well.  Nylon has the highest tensile strength of any fiber suitable for the manufacture of 'netting' hammocks and will last 4 - 5 times longer than natural fibers. Nylon also has good resistance to abrasion and UV deterioration from sunlight (UV stability) and will outlast cotton for outdoor hammock use.  

Hammocks are traditionally made with cotton and used only as indoor furniture extensively throughout Central and South America.  Cotton hammocks are unsuitable for outdoor use, where the natural organic fibre will mildew and rot in any damp environment. Outdoor hammocks need to be made with a good quality 100% non-organic fibre, to withstand mildew and eventual rot.