Floating Hot Tub Solar Cover 14 mil Hot Tub Insulation Blanket Square Spa Cover Floating. 【Square 7x7 FT】: Our thermal solar blanket cover is 7x7 ft /84 x84 in and fits most square hot tubs. If your tub has more irregular shapes, you can put the cover over the hot tub first, then make a mark and cut along the mark.
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