COLD RESISTANCE & SUPER SEAL PERFORMANCE : Winpull air pillow for above ground pools is made of 0.6mm thickened cold-resistant PVC. This pool winter pillow will cope with the cold as bad as 10 F (25 C), it also can handle the heat of up to 180 F (80 C). Additionally, our winter air pillows are designed with double seal embossing technology, which means no leaks, tears or deflations all winter long
