Our cover is used to protect your swmming pool&spa &hot tub &bathtub and avoid steam loss and ... cover, hot tub cover ,bathtub cover, swim spa cover, swimming pool cover ,lifter for cover ,PVC water pipe and related accessories ... Workmanship , Durability2) Marine Grade top vinyl reinforce the function of Waterproof ,Anti-Mildew, Moistureproof , UVInhibitors,Cold cracking resistance,Abrasion resistance. ...