... spa cover, which has the characteristics of waterproof,UV resistance,heat-resistance, burn-resistance, anti-mildew, wear-resistance and so ... which can enhance the insulating value and improve the heat-retaining capacity, in this case,we can help consumer to save energy ... resistance.4.Lining(back side) : We use cold cracking resistance,heat-resistance,anti-mildew and tear-resistance fabric.5.Tie-down ...