I cover mine and have since new. Most people do not cover. Covers rip at the corners and rip in the wind and can chafe the corners of your rig so say many people.
I am glad I cover mine, each cover last me from three to five years, They have protectwd my rig and hekped keep it new looking. The more I spend the longer they last. I have an Adco Designer cover now. I can get it on and off by myself (easier with two people).
I believe you will find most people do not like them---I like mine fine and when it rips and wears out I will get another.
I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
Doc(He's a PhD)