patio chair cushions 18 x 20

Typical listings show seat widths of about 18–20 inches, seat depths around 16.5–18 inches, back heights about 20–22.5 inches, and cushion thicknesses ranging roughly 3.5–5 inches.

Outer fabrics are commonly 100% polyester, and fills are polyester-based (polyfiber or blowfill). Several listings also note partially recycled polyester fills or fill made from recycled plastic bottles.

Many cushions have water-repellent and fade-resistant finishes and are described as water- and UV-resistant. Some listings specifically call out an eco-friendly PFAS-Free C0 water treatment.

Care instructions commonly recommend spot cleaning or wiping with soap and water for easy maintenance. Follow any manufacturer directions on the product label for best results.

Some listings highlight eco-friendly elements such as PFAS-Free C0 water treatments and fills made from recycled polyester or recycled plastic bottles (partially recycled polyester fiber fill).

Most options shown are sold as 2-piece sets (seat and back). At least one option is listed as a single hinged seat-and-back cushion.