Welcome to the Forum from Western New York State!
We bought an Adco for our 2012 TT, and it lasted about 7 years before showing its age. Our current one is from National RV Covers (bought in 2019) which we're happy with, and I expect it to last about as long. Measure the body length carefully, you don't want one that fits too tight. It would be a pain to get on and off.
Out TT is called 23', the body is 19' 7" (235") so I ordered one to fit a 21' trailer. It turned out to be 270" long. 35" longer. So I believe National RV Covers are made to allow for easy installation if you order one for the exact footage of your trailer (if I'm making any sense of this).
To be honest, the net one will probably be another Adco since the price of our current cover has more than doubled since 2019.