Transhield's universal pontoon boat covers provide your pontoon watercraft with complete protection for winter storage. Transhield pontoon covers are made using Transhield's patented 7mil material, composed of polyethylene on the outside and a soft non-woven on the underside. The material is durable, breathable, UV-resistant, waterproof, reusable, and non-abrasive to the surface of your boat. Straps are included to secure the fit and vents are provided to maintain air circulation. Support poles are sold separately. The material is also shrinkable (optional) for an even tighter fit.