Looks like nylon webbing except it's a little coarser and it's made from polypropylene......They have it at Seattle Fabrics,Quest Outfitters and the like.


Nylon--------------poly-----------crossgrain

Polypropylene is what is used on boats or when wet.Lasts longer in the sun and elements than nylon.

When you buy material for boat covers or patio covers ( Like Sunbrella .... a brand of poly material....like Levi's is a brand of cotton denim) it's made from poly not nylon.