I found some Neat Sheets to use for a DIY SPE today at Toys-R-Us. After looking at this material is there any reason not to use this to make an undercover from?? Granted it's not as light as Silnylon actually not sure what it's exact weight is but feels light? It does breath a little and resists water and dirt better than Tyvek. Please advise...

http://www.theneatsheet.com/