This cover

Weatherproof Max
Use A jet ski that lives on the trailer
Fabric Heavy-duty weatherproof fabric with UV-treated coating
Holds on with Elastic hem and buckle strap system for snug fit

Made by UTVCovers, an AllGuard brand
Built for a jet ski that lives on the trailer, with protection from salt, UV and weather.
Every line is from utvcovers.com.
Start with where your jet ski is kept. The jet ski covers from UTVCovers, side by side.
This cover

Use A jet ski that lives on the trailer
Fabric Heavy-duty weatherproof fabric with UV-treated coating
Holds on with Elastic hem and buckle strap system for snug fit

Use Trailer storage and indoor use
Fabric Weather-resistant fabric with UV coating
Holds on with Elastic hem and strap system