Top 10 Outdoor Seat Cushions 18 x 20 – Patio Furniture Cushions

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1. FLYMEI

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Water Resistant Chair Seat Covers Only 20'' X 18'' X 4'' 4Pack, FLYMEI Patio Cushion Covers, Grey, Outdoor Cushion Covers Replacement

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FLYMEI #ad - 80% water repellent so you can easily wipe off any dirt. Durable & water resistant materialoutdoor cushion slipcover is made of durable canvas polyester fabric, fade resistant, weather resistant.

Patio cushion covers bring new life to your outdoor sofa. 20x18x4 inches in grey, only covers4 packs outdoor seat cushion covers with bright and captivating fashion-forward look that Fits Most Deep Seat Cushions and Backs for Chairs, Love Seats or Sofas with Individual Cushions. Choose outdoor cushion covers to renew the look of your old couch! Colorful seat cushion coverhigh quality fabric to ensure fade-proof in the sunlight.

Washing tipseasy to insert and remove the seat cushion. Note: please double measure your cushion size before purchasing. Invisible zipper designdouble stitched and equipped with zipper, it opens fully along one side, easy to put on / remove. Lightly spot clean or hand wash with cold water, then let air dry.
BrandFLYMEI #ad
ManufacturerFLYMEI #ad
Height4 Inches
Length20 Inches
Width18 Inches

2. Cooskin

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Cooskin Patio Outdoor Furniture Set Cushion Breathable Water-Resistant Deep Outdoor Loveseat Cushions Patio Adirondack Chair Cushion Replacement 20 x 18 x 4 inch Set of 2 Beige Yellow

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Cooskin #ad - Super resilience: cooskin cushion is filled with 100% new sponge - environmentally friendly, easy to clean and has good breath ability. Comfortable choice: ditch your rotting cushions, we offer set of 2 100% brand new foam cushions. Don't worry that your cushion will collapse after a long time, recyclable, our products have super resilience.

Trust us, you'll love this cushion for your outdoor chair and enjoy your outdoor leisure time comfortable. Size & installation: the set includes two seat cushions 20 x 18 x 4 inches, easy to install, matching most 3 pieces patio conversation sets and patio bistro sets on the market. Cover material: the cushion cover is made of 100% polyester fabric, not easy to get dirty, water resistant, durable, UV-resistant, suitable for indoor and outdoor furniture.

The fabric is also water repellent to prevent stains making it a low-maintenance patio cushion. After-sale guarantee: the cushions are coming with 2 years full warranty, put away the seat cushion, under normal weather and usage. Any problem about our product, please contact us by Amazon message directly. Please note in rainy or snowy days, which can effectively prolong the service life of the seat cushion.
BrandCooskin #ad
ManufacturerCooskin #ad
Height0.04 Inches
Length20 Inches
Width18 Inches

3. NettyPro

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20 x 18 x 4 Inch, Nettypro Patio Cushion Covers Replacement 2 Pack Water Repellent UV Resistant Outdoor Chair Seat Cushion Slipcover

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NettyPro #ad - Secure fit: the attached ties on both sides secure the cushion to the chair and keep it in place even in windy conditions. Dimensions: the outdoor cushion cover measures 20"L x 18"W x 4"Thick, covers only, fits most deep seat cushions and backs for chairs.

Easy to use: the zipper opens fully along one side, and partially along two adjoining sides making it very easy to put on. One-year limited warranty, insert not included. Water resisitant: the water just beads up on slipcover after a drenching rain and can be whisked away by hand. Fadeproof: made of heavy polyester with high UV resistant coating, ensures the bright color of the pattern and make your patio an updated look. Zipper tape also prevents rainwater from entering through the zipper. All of the inside edges are finished and no pieces of thread impeding the zipper.
BrandNettyPro #ad
ManufacturerNettyPro #ad
Height18 Inches
Length20 Inches
Width4 Inches
Part NumberCUT-2018-2

4. Honeycomb

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Honeycomb Indoor/Outdoor Textured Solid Teal Dining Seat Cushions: Recycled Polyester Fill, Pack of 2 Patio Cushions: 20" W x 20" D x 4" T, Weather Resistant

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Honeycomb #ad - Our 4-inch outdoor seat cushion is resilient and made to ensure comfort, long life span and improved joint support. The fabric is also water repellent to prevent stains making it a low-maintenance patio cushion. Universal fit – these cushions are made to order with universal style to fit most patio chair cushions.

The patio cushion also consists of a reversible design allowing it to be flipped from either side for use on your patio furniture. Superior softness – these dining seat cushions have polyester filling for superior softness. Weather resistant – enjoy your patio furniture cushion inside or outside as the Olefin Fabric will resist fading with UV resistant properties.

Effortless care – these beautiful chair covers can be easily cleaned using a sponge or rag soaked with mild soap and warm water. Environment friendly – take a greener approach to your poolside or patio furniture with our outdoor cushion that contains Polyester fiberfill made from recycled plastic bottles and is filled and finished in the USA. Simply hang the outdoor cushions and let air dry.
BrandHoneycomb #ad
ManufacturerHoneycomb #ad
Height0.01 Inches
Length4 Inches
Weight3 Pounds
Width4 Inches
Part Number21312S-201A134
ModelPremium Dining Seat Cushion (2-Pack)
Warranty1 Year Limited Warranty

5. Classic Accessories

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Outdoor Loveseat Cushions, Classic Accessories Montlake Water-Resistant 19 x 20 x 4 Inch Patio Lounge Back Cushion, Light Charcoal Grey

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Classic Accessories #ad - They are stored in protective garages to stop scratching your furniture when closed and offer a clean look. Bound interior seams are engineered to provide strength and durability at the most demanding joints. Water-resistant coating and backing: Resists stains and helps keep rain out and your cushion foam protected.

Complete your outdoor oasis: looking for the entire patio set? Our extensive collection includes: lounge chair cushion, outdoor loveseat cushions, and wide seat back cushion. Montlake fadesafe fabric system: Montlake FadeSafe solution dyed fabric is both stylish and engineered to resist fading. You can refresh your cushions by choosing a new cover color or replace worn out foam with our high-density replacements. Locking zippers disappear in garages when not in use: Zippers lock to keep a tight closure and assist in stuffing the cushion.

Durable patio cushion: cushion measures 19"W x 20”H x 4”T. Double stitched construction: double-stitched seams ensure strength under stress while piping adds a sophisticated look. Patio cushions with warranty: one-year limited warranty. Fashion forward colors: Selected to enhance and coordinate with your outdoor living space. Product selection: 28 sizes and shapes to fit most patio furniture.
BrandClassic Accessories #ad
ManufacturerClassic Accessories #ad
Height0.04 Inches
Length20 Inches
Weight4.6 Pounds
Width19 Inches
Part Number62-047-LCHARC-EC
Model62-047-LCHARC-EC

6. YINSHIFU

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Patio Cushion Covers 4 Pack Outdoor Deep Seat Patio Chair Cushion Cover Water Resistant Patio Cushion Slipcover Replacement 20x18x4 Inches Tropical Leaves 1

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YINSHIFU #ad - 4 packs outdoor seat cushion covers with bright and fashion look. Covers only, insert not included. Easy to use: the zipper opens fully along one side, easy to put on or remove.

Durable & water resistant: Outdoor cushion cover replacement is made of durable polyester fabric, fade resistant, weather resistant. Machine wash or hand wash with cold water, then let air dry. Outdoor cushion covers: measures 20"l x 18"w x 4"thick, fits most deep seat cushions and backs for chairs. Note: please double measure your cushion size before purchasing. Machine wash: easy to insert and remove the seat cushion. Colorful cushion covers: made of heavy polyester with high UV resistant coating, ensure fade-proof in the sunlight and make your patio an updated look.
BrandYINSHIFU #ad
Height0.04 Inches
Length20 Inches
Width18 Inches

7. Pillow Perfect

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Pillow Perfect Outdoor/Indoor Carmody Navy Square Corner Seat Cushions, Blue, 2 Count Pack of 1

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Pillow Perfect #ad - Care instruction: Spot Clean Only. Attached ties keep outdoor cushion securely fastened to your outdoor patio furniture. Fill material: 100% Polyester Fiber.

Includes two 2 outdoor seat cushions, resists weather and fading in sunlight; Suitable for indoor and outdoor use. New and improved 100-percent polyester fiber filling offers an even cushier feel with greater durability. Measures: 18. 5-inch length x 16-inch width x 3-inch depth Length, width and depth measurements may vary up to 1-inch since item is handcrafted. Easy care - lightly spot clean or hand wash outdoor cushion fabric with mild detergent and cool water; then let air dry.
BrandPillow Perfect #ad
ManufacturerPillow Perfect #ad
Height16 Inches
Length18.5 Inches
Weight2 Pounds
Width16 Inches
Part Number500775
Model500775

8. Classic Accessories

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Durable Patio Furniture Cushion with Straps,Spice, Classic Accessories Ravenna Water-Resistant 21 x 19 x 5 Inch Outdoor Seat Cushion, Patio Loveseat Cushion

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Classic Accessories #ad - Durable outdoor cushion: Cushion measures 21"W x 19"D x 5"Thick. Patio cushions with warranty: one-year limited warranty. Heavy-duty outdoor cushions: Bound interior seams are engineered to provide strength and durability at the most demanding joints.

Patented attachment system: patented Attachment System adjustable belted hem with click-close straps provides a tight, customizable fit to keep your cushion where you want it. Gardelle one fabric system: gardelle One is a solution-dyed durable woven polyester fabric with a protective water repellent coating and water-resistant laminated backing. Locking zippers: zippers lock to keep a tight closure and make stuffing the cushion easier. 3-layered cushion foam: foam is designed for comfort and support, with outer layers of open-cell foam enclosing a high-density core that is resilient but conforms to your shape.

Complete your outdoor oasis: looking for the entire patio set? Our extensive collection includes: lounge chair cushion, patio loveseat cushion, and outdoor chair cushions. Water-repellent coating and backing: Water-repellent coating resists stains and helps keep rain out and your cushion foam protected.
BrandClassic Accessories #ad
ManufacturerClassic Accessories #ad
Height5 Inches
Length21 Inches
Weight5.2 Pounds
Width21 Inches
Part Number62-017-SPICE-EC
Model62-017-SPICE-EC
WarrantyContact manufacturer

9. Pillow Perfect

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Pillow Perfect 543789 Outdoor/Indoor Pretty Paisley Navy Tufted Seat Cushions Square Back, Blue, 19" x 18.5", 2 Pack

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Pillow Perfect #ad - Easy care - lightly spot clean or hand wash outdoor cushion fabric with mild detergent and cool water; then let air dry. Attached ties keep outdoor cushion securely fastened to your outdoor patio furniture.

Measures: 19-inch length x 18. 5-inch width x 5-inch depth measurements may vary up to 1-inch since item is handcrafted. Fill material: 100% Polyester Fiber. Item is hand-crafted, and requires a break in period of 3-4 hours use to reach desired size. Includes two 2 outdoor seat cushions, resists weather and fading in sunlight; Suitable for indoor and outdoor use. Plush fill - 100-percent polyester fiber filling. Care instruction: spot clean Only.
BrandPillow Perfect #ad
ManufacturerPillow Perfect #ad
Height0 Inches
Length19 Inches
Weight5 Pounds
Width18.5 Inches
Part Number543789
Model543789

10. Arden Selections

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Arden Selections ProFoam Essentials 19 x 20 x 3.5 Inch Rounded Back Outdoor Dining Cushion, Ruby Red Leala

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Arden Selections #ad - A cushion we believe in: We offer a 1 year limited warranty for manufacturing defects on the total cushion. Once opened, the foam is easy to put in to the cover and will fully recover in fewer than 24 hours.

Measure the seat of your furniture to feel confident that this common size cushion will fit! Environmentally conscious shipping: this profoam kit includes 1 compressed foam roll & 1 cushion cover. Uv & water resistant: printed 100% polyester fabric offers UV resistance and a DWR treatment provides water repellency. Durable outdoor cushion: Featuring 100% polyurethane foam, these durable cushions provide long-lasting support. A great fit: this cushion measures 19" deep x 20" wide x 3. 5" thick with a rounded back. We ship this way to reduce the amount of space outdoor cushions take up while in transit.
BrandArden Selections #ad
ManufacturerArden Companies #ad
Height3.5 Inches
Length20 Inches
Weight2.11 Pounds
Width19 Inches
Part NumberTG06F01B-DKZ1
ModelTG06F01B-DKZ1
Warranty1-Year Limited Warranty for Manufacturing Defects