I've heard that Tyvek and Adco are decent brands. But watch to ensure it fits your rig and fits snugly or the flapping will cause problems. Don't forget to wash the rig real well before covering. Also mind the wet weather, you don't want mold/mildew building up under there. Do allow plenty of time to cover the trailer and lash it all down nice and snug (not tight, unless instructed).