I’ve had my Sun EZ-1 Lite since February of 2013. I purchased one of these replacement meshes soon after buying the bike so I would have it on hand when the original mesh needed replacement. The original mesh was perfect for years even with repeated cleanings in my clothes washer (at least once a year just for general cleaning and each time a bird got it or other filth needed to be removed). Of course, everything wears out: In early 2018 the original mesh developed a couple of holes. I slapped some duct tape on the back to keep the holes from getting larger but I like my gear to look good so early in the spring of 2019 when the worst of the cold weather was finally over I installed the replacement mesh.The replacement mesh is much thinner and lighter than the original. The original was made of tough fabric, the replacement is a single layer of unreinforced material stretched between multiple layers of reinforced material anchored around the perimeter. I doubt it’s going to last 5-6 years the way the original did. On the upside, the replacement mesh fits perfectly, I like the plastic clasps very much, and the addition of the velcro to the straps keeps them neat and tidy – I had to tie knots or use little alligator clips to keep the ends of the straps from flapping around on the original. The replacement, when tensioned properly with the straps, feels very tight and firm against my back but breathes very well, I think it allows my back to remain cooler in hot summer weather than the original.If I continue to own my EZ-1 long enough for this mesh to wear out, and it lasts at least 3 years, I’ll purchase another when needed.