IMO I would never store a nice car outside with a car cover. Your paint will suffer greatly as the wind will cause the rough inside of cover to rub against the exterior causing more harm then good.
I used this one with good results...well reviewed and great price!
https://m.lowes.com/pd/Kobalt-1-2-in-Drive-Click-50-ft-lbs-to-250-ft-lbs-Torque-Wrench/3381202
While this is open to debate on a black roof car with an over the roof stripe combo of which was never available. It is however very aesthetically pleasing in the stripe and black roof combo version that was available prior to MY18...of which there are many examples! (See Pics)
As to why...