Aqua Creek F-MTLCB-HE Mighty Lift Blue Premium Cover. The fabric used for all of Aqua Creek’s covers is a heavyweight, polyester fabric. Polyester fabric is durable and breathable. It is soft, dries fast and has good elastic and high waterproof characteristics. Our standard covers come with a PVC coating, are pigment dyed, and are available in Blue, Tan and Gray colors. Premium covers provide a more flexible Polyurethane coating and are solution dyed to help prevent fading.