This cover

Weatherproof Max
Use Off-season storage and transport
Fabric Heavy-duty weatherproof fabric with UV-treated coating
Holds on with Multiple buckle & strap system for a snug, wind-resistant fit

Made by UTVCovers, an AllGuard brand
Built for off-season storage and transport.
Every line is from utvcovers.com.
Start with where your sled is kept. The snowmobile covers from UTVCovers, side by side.
This cover

Use Off-season storage and transport
Fabric Heavy-duty weatherproof fabric with UV-treated coating
Holds on with Multiple buckle & strap system for a snug, wind-resistant fit

Use Garage and indoor storage
Fabric Water-resistant fabric with UV coating
Holds on with Buckle and strap system, elastic hem around the full perimeter