Waterproof Hot Tub Cover -Outdoor Spa Cover Cap(Actual Size 93"x93 x20" Fit 91"x91 x 20") 600D Heavy Duty Polyester Hot Tub Cover Protector(Dark Gray). Product Material: The waterproof hot tub cover is made of 600D Polyester Fabric and TPU backing layer(much better than PVC !).
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