1. and Install Designed with zipper and nylon snap fastener opening, it is simple and convenient to install without removing the hose and use without removing the pump cover. When not in use, the zipper can be closed to prevent dust and other dirt 2. Tightly Secured The 3 nylon buckles on the side keep the cover tightly secured to the spa heater pump to withstand harsh weather and keep it from being blown away by the wind 3. Side Buckle Design The side buckle design allows the protective cover to cover your spa heat pump unit. And the all weather protection keeps your spa heating pump clean, dry and looking like 4. Quality 600D Polyester Canvas The hot tub spa heater pump cover is made of high quality 600D polyester canvas material, sturdy, reusable, rain and tear resistant, prevents your spa heating pump from water, dirt, moisture and so on, thus prolonging the life of the machine.