If it’s the Tough-1, as of 4 years ago it was not UV rated.
From the Tractor Supply Website Q/A
Q: Does this fly sheet have UV protection?
Gloryhorse154 years ago
1 Answer
A: Thank you, this sheet is not UV rated.
Tough 1 Product Experts4 years ago
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I bought one for each of mine earlier this year and I can double check the packaging when I get home. I haven’t used them (bought for camping) yet so I can’t comment on quality.