Dyneema is a remarkable material & it is true to say that it has revolutionised sling production. It has several advantages over the traditional nylon webbing. For a start it is incredibly light & strong, it is also less susceptible to UV degradation & is more abrasion resistant. There are other advantages too which will help you when you are out on the crag. The skinny profile of the tape means that you can take advantage of much narrower threads & the sling is less likely to slide off marginal spike placements.