Is the fabric really waterproof?

It is 600D Oxford fabric with a waterproof coating, so it sheds spills and light rain. Standing water or long soaking can still work through seams, so bring cushions in during heavy storms.

Will 22 by 22 inches fit my patio chairs?

That size matches most standard square patio and dining chairs. Measure your seat width and depth first, since a 4-inch cushion raises the seat height.

How does 600D Oxford compare with cheaper cushion fabric?

600D is a denser, heavier weave than the 300D–420D fabric on many budget cushions, so it resists abrasion and sagging better. It is a step up in durability without the cost of solution-dyed acrylic.

Are these cushions firm or soft?

They are on the firm side. The 4-inch loft gives more support than thin 2–3 inch cushions, which suits people who want structure rather than a plush sink-in feel.

Can I leave them outside all season?

They handle sun and light rain, but the waterproof coating is not a guarantee against prolonged soaking. Bring them in or cover them during heavy rain and winter to extend their life.

Do they come with ties to keep them in place?

The product is described as a plain square cushion without ties or straps. On smooth or sloped frames, expect to reposition them or add your own fastening.