Cotton garden cushionsCotton garden cushions usually feel more comfortable because cotton is a natural material. It is softer and breathable, which means it is often more comfortable than synthetics in hot weather. Cotton cushions, like cotton clothes, sweat less and wick away moisture better. As a result, it does stain a little easier because liquids soak in unlike, say, polyester. Sometimes cotton cushions are coated with a water-repellent layer like clothes or shoes against external influences. They are then less likely to get dirty. It doesn't have to be a problem, though, because garden cushions often have a separate cover that you can wash.