Marstrom 32 Yard Cover. The Kinder Industries Marstrom 32 Yard Cover is fabricated using a ” Sundura” based Polyester fabric called Weather-Maxx. This cover is faricated in multiple pieces which attach using 2 Inch Velcro. The cover also has large mesh drains so the cover does not fill with water. Please call for more information regarding our Marstrom 32 boat covers.