I bought this to support large tomato plants on a trellis system outside in the garden specifically because of the fact that, being nylon, it wouldn't suffer under intense UV rays like a cotton twine would. So far, they have held up very well to support the vines, some over 7' tall already with large tomatoes, through wind and rain. Time, and the rest of the growing season, will tell whether this was the right product to use. I like it so far.See full review