Outdoor floor cushions need PU or PVC coatings to ensure they can resist water and moisture. These coatings also improve the general durability of outdoor floor cushions. PU is polyurethane with PVC as polyvinyl chloride. Although both coatings are similar, you’d be better off understanding their notable differences.
A PVC coating tends to disintegrate in a faster pace compared to a PU coating, most especially in higher temperatures. Prolonged exposure to sunlight will also deteriorate the coating faster.
As for PU, it’s flexible as it’s a rubber-like substance. It is also capable of withstanding high temperatures, unlike PVC.
In general, a PVC-coated outdoor floor cushion is waterproof. However, it isn’t breathable. PU-coated cushions, on the other hand, are both breathable and waterproof.