I agree but I'm still going to try to find something else. The silt fence last about 2yrs but its not completely water proofHonestly it depends on the weather. You’re right the UV rays just kill them fast. They dry out and the birds shred them pretty fast. I usually replace them at the end of summer and the end of winter. There’s always a few here and there that need to be replaced more often. You can open up 10 tarps and they’ll all be a little different color and thickness. That’s Chinese quality for ya. They’re cheap though so whatever.