Robic nylon is up to 50% stronger with up to 2.5x the tear strength compared to standard nylon 6 fabrics. In other words, it's hard to break and tough to rip. Robic nylon features a proprietary backside coating called UTS (Ultra Tear Strength). Unlike many traditional PU coatings, UTS is specially formulated to increase tear strength while offering excellent hydrolysis performance (i.e. breakdown of coating in water).