Crisp, clean new Tyvek that has been cut to the right size for my Duo, with straight clean edges. I believe it weighs about 9 oz for the Duo.
First time Tyvek ground cover user. The material is very loud, strong, and crinkly new material; I may wash it once or twice to get it quieter and softer.
Biggest drawback of this item is that my Duo Floor slides around on this ground cover like ice. There is virtually no friction between the two surfaces which is obnoxious and can put some strain on the corners when the floor pulls tight. If I don’t wash the ground cover, I’ll probably brush some silicone caulk on this so the floor can grab something.