Best 18X18 Seat Cushion Outdoor in 2022 [*Top Picks*]

Looking for the best 18x18 seat cushion outdoor on the market? We’ve got you covered. Check out our ratings of absolute bestsellers below and make a final decision.

6160 Reviews Scanned

  • HARBOREST Outdoor/Indoor Waterproof Round Corner Seat Cushion, Patio Furniture Cushions with Ties, 17
    Bestseller #1
    HARBOREST Outdoor/Indoor Waterproof Round Corner Seat Cushion, Patio Furniture Cushions with Ties, 17" X 16" X 2", Rainbow Stripes, 4 Pack (330)
      FIT FOR ANY CHAIR - Sit comfort for your family to come! Our chair cushions are designed to fit all chairs. These square cushions measure 18.5"x16"x3" and the round cushions measure 17"x16"x2". These dimensions are a perfect fit for almost all outdoor chairs. BEAUTIFUL PATTERN DESIGN - The cover of these cushions utilize various styles design that is a perfect fit for any decor. These pattern is a stylish and unique pattern which looks beautiful on any chair. DURABLE, WATERPROFF, EASY TO CARE - We use special waterproof fabric,Strength and durability and built into every inch. the outdoor cushions are super easy to clean! Simply spot clean with a damp cloth and your chair pads will look as good as new. WHAT'S in PACKAGE - Patio chair cushions set of 4.To save resources, we use vacuum packaging.so please put the chair cushions exposing for about 24 hours to restore to normal thickness. PROFESSIONAL SERVICE - If you have any questions, please contact us,our professional service team will provide you within 24-hour and let you get a satisfactory answer
  • Honeycomb Indoor/Outdoor Textured Solid Almond Universal Seat Cushions: Recycled Polyester Fill, Weather Resistant, Pack of 2 Patio Cushions: 18
    Bestseller #1
    Honeycomb Indoor/Outdoor Textured Solid Almond Universal Seat Cushions: Recycled Polyester Fill, Weather Resistant, Pack of 2 Patio Cushions: 18" W x 17.5" D x 2.5" T (371)
      SUPERIOR SOFTNESS – These Universal Seat Cushions have polyester filling for superior softness. Our 2.5-inch outdoor seat cushion is resilient and made to ensure comfort, long life span and improved joint support. 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. WEATHER RESISTANT – Enjoy your patio furniture cushion inside or outside as the Olefin Fabric will resist fading with UV resistant properties. The fabric is also water repellent to prevent stains making it a low-maintenance patio cushion. EFFORTLESS CARE – These beautiful chair covers can be easily cleaned using a sponge or rag with mild soap and warm water. Simply hang the outdoor cushions and let air dry. UNIVERSAL FIT – These cushions have a universal style to fit most patio chair sets. The patio cushion has a reversible design that can be flipped from either side for use on your patio furniture. Cushion size may range 0.5” larger or smaller.
  • Magpie Fabrics Indoor/Outdoor Waterproof Square Corner Seat Cushion, 18
    Bestseller #1
    Magpie Fabrics Indoor/Outdoor Waterproof Square Corner Seat Cushion, 18" x 18" x 2.5", 2 Pack, Weather Resistant Universal Seat Cushions, for Patio Garden Dining(Navy Blue) (68)
      ✿【Softness and Support】- Comfortable for long sitting even on the hardest chairs. High quality foam filling, great resilience, not easily deformed. Update your room in seconds with its beautiful color palette. Size: 18"x18"x2.5", 2 Pack. ✿【Active Ties & Invisible Zipper】- Attached ties keep cushions securely fastened to your furniture. Removeable cover can be easily washed. Invisible Zipper is wear-proof and it provides a more tailored look. ✿【Weather Resistant & Waterproof】- Won’t fading under the direct sunlight for over 500 hours, which can last for several seasons. Stain resistant, The water or slops just beads up on slipcover and can be whisked away by hand. ✿【Widely Use & Easy Care】- Enjoy your patio furniture cushion inside or outside. Perfect for living room, dining room, garden, balcony, office or school, also is a perfect gift for friends. Easy use and care, spot clean only with warm soap water, then let the air dry. ✿【100% Satisfaction Warranty】- Every Chair pads we offer premium quality and amazing workmanship. In addition, You can get friendly customer service and 30 days no reason to return.
  • Classic Accessories Montlake Water-Resistant 54 x 18 x 3 Inch Outdoor Bench/Settee Cushion, Patio Furniture Swing Cushion, Light Charcoal Grey, Patio Loveseat Cushion
    Bestseller #1
    Classic Accessories Montlake Water-Resistant 54 x 18 x 3 Inch Outdoor Bench/Settee Cushion, Patio Furniture Swing Cushion, Light Charcoal Grey, Patio Loveseat Cushion (386)
      DURABLE PATIO CUSHION: Cushion measures 54"W x 18”D x 3”T PATIO CUSHIONS with WARRANTY: One-year limited warranty MONTLAKE FADESAFE FABRIC SYSTEM: Montlake FadeSafe solution dyed fabric is both stylish and engineered to resist fading WATER-RESISTANT COATING AND BACKING: Resists stains and helps keep rain out and your cushion foam protected DOUBLE STITCHED CONSTRUCTION: Double-stitched seams ensure strength under stress while piping adds a sophisticated look. Bound interior seams are engineered to provide strength and durability at the most demanding joints. LOCKING ZIPPERS DISAPPEAR IN GARAGES WHEN NOT IN USE: Zippers lock to keep a tight closure and assist in stuffing the cushion. They are stored in protective garages to stop scratching your furniture when closed and offer a clean look PRODUCT SELECTION: 28 sizes and shapes to fit most patio furniture FASHION FORWARD COLORS: Selected to enhance and coordinate with your outdoor living space UPDATE WITH EASE: No need to purchase a whole new set of cushions if your foam or skin wears out. you can refresh your cushions by choosing a new cover color or replace worn out foam with our high-density replacements COMPLETE YOUR OUTDOOR OASIS: Looking for the entire patio set? Our extensive collection includes: outdoor seat cushion, patio loveseat cushion, and bench seat cushion
  • Duck Covers Water-Resistant 19 x 19 x 5 Inch Indoor Outdoor Seat Cushions, Blue Lagoon Geo, 2-Pack, Outdoor Patio Cushions
    Bestseller #1
    Duck Covers Water-Resistant 19 x 19 x 5 Inch Indoor Outdoor Seat Cushions, Blue Lagoon Geo, 2-Pack, Outdoor Patio Cushions (386)
      OVERSTUFFED TO PERFECTION: A soft, polyester fiber fill provides 5 glorious inches of comfort* BRING ON THE COLOR: Add some color to your life with 19 x 19 x 5 inches of playful hues meant to brighten your day MAKE A SPLASH: Eyelets provide subtle style and let water escape rather than puddle on the cushion; water-resistant coatings help keep spills off and make it easy to spot-clean USE IT EVERYWHERE: Durable fabrics make this an ideal indoor or outdoor cushion 1-YEAR WARRANTY: We provide a one-year limited warranty on our Duck Covers cushions *Dimensions may vary. Please allow 24-48 hours for your product to fully expand after unpacking. COMPLETE YOUR OUTDOOR OASIS: Looking for the entire patio set? Our extensive collection includes: patio seat cushions, outdoor patio cushions, and patio chair cushions set of 2
  • Uheng 4 Pack Patio Outdoor Chair Cushions with Ties, Seat Pads Mat, Waterproof Removable Cover, Comfort Memory Foam Nonslip for Garden Deck Picnic Beach Pool -18
    Bestseller #1
    Uheng 4 Pack Patio Outdoor Chair Cushions with Ties, Seat Pads Mat, Waterproof Removable Cover, Comfort Memory Foam Nonslip for Garden Deck Picnic Beach Pool -18" X 18"(Red) (82)
      💺【PERFECT SIZE】: 18" X 18" X 1.6"(45 X 45 X 4CM). Simply pick up chair pad and take it with you for added comfort anywhere in your home. NOTE: Our chair pads are vacuum sealed, if you mind, please think it over before buy them. 💺【EXTRA COMFORTABLE】: Each chair cushion features improved 100-percent polyester fiber filling offers an even cushier feel with greater durability. Stylish and functional, these chair cushions give you that extra padding you've been looking for. 💺【WATERPROOF REMOVABLE COVER】: Easy to wash with zipper design. Resists weather and fading in sunlight. Suitable for indoor and outdoor use. Perfect for kitchen, dining room, outdoor, patio and any other chair that needs additional comfort. 💺【NON-SLIP】: Two ties at the back of the chair pad allows it to be neatly tied to chair rungs. Non skid backing helps to keep chair pad firmly in place. 💺【EASY CARE】: Lightly spot clean or hand wash outdoor cushion fabric with mild detergent and cool water; then let air dry.
  • Arden Selections Rounded Back Seat Cushion, 18 D x 18 W x 2.5 H, Cream
    Bestseller #1
    Arden Selections Rounded Back Seat Cushion, 18 D x 18 W x 2.5 H, Cream (386)
      A GREAT FIT: This cushion measures 18" deep x 18" wide x 2.5" thick with a rounded back. 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. We ship this way to reduce the amount of space outdoor cushions take up while in transit. Once opened, the foam is easy to put in to the cover and will fully recover in fewer than 24 hours. DURABLE OUTDOOR CUSHION: Featuring 100% polyurethane foam, these durable cushions provide long-lasting support. TAKE ON EVERYDAY WEATHER & SPILLS: EverTru Acrylic solution dyed fabric offers 5+ years of UV resistance and the proprietary EverBloc treatment provides stain and water repellency. A CUSHION WE BELIEVE IN: We offer a 5 year limited warranty on our EverTru fabric and 1 year limited warranty for manufacturing defects on the total cushion.
  • Trupedic x Sunbrella - Indoor Outdoor Chair Cushions, Set of 2 | Perfect for Office, Dining, Kitchen, Patio, Porch or Deck | Measurements: 19 in x 19 in x 2.5 in | Spectrum Indigo
    Bestseller #1
    Trupedic x Sunbrella - Indoor Outdoor Chair Cushions, Set of 2 | Perfect for Office, Dining, Kitchen, Patio, Porch or Deck | Measurements: 19 in x 19 in x 2.5 in | Spectrum Indigo (386)
      [WHY SUNBRELLA] - Sunbrella fabrics are the complete performance standard, with best comfort, color retention, cleanability and strength that lasts. Whether transforming your patio into your personal oasis, replacing a cushion on its last leg, or hosting a gathering, Sunbrella helps you bring your vision to life with beautiful fabrics you will enjoy for years! [EASY TO CLEAN] - When you choose Sunbrella performance fabrics you get complete performance–durable and stain resistant fabrics that are easy to clean. When spills or messes happen, Sunbrella fabrics can be cleaned quickly with mild soap and water so you can get back to living comfortably. [BUILT TO WITHSTAND MOTHER NATURE] - Sunbrella fabrics are engineered to withstand Mother Nature, and the harmful effects of exposure to sun, rain, snow, and humidity. Sunbrella fabrics are also engineered with built-in moisture resistance. Even after daily use, Sunbrella fabrics stand up to life’s toughest messes. [PROUDLY MADE IN NORTH AMERICA] - All Trupedic products are proudly made in North America! Trupedic uses top quality materials will last for years to come and provide just the relaxation you deserve. [WHAT IS INCLUDED] - Two (2) Sunbrella Seat Cushion measuring 19 in x 19 in x 2.5 in each.
  • 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)
    Bestseller #1
    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) (43)
      COMFORTABLE CHOICE: Ditch your rotting cushions, we offer set of 2 100% brand new foam cushions. Trust us, you'll love this cushion for your outdoor chair and enjoy your outdoor leisure time comfortable. SUPER RESILIENCE: Cooskin cushion is filled with 100% new sponge - environmentally friendly, recyclable, easy to clean and has good breath ability. Don't worry that your cushion will collapse after a long time, our products have super resilience. COVER MATERIAL: The cushion cover is made of 100% polyester fabric, UV-resistant, water resistant, durable, not easy to get dirty, suitable for indoor and outdoor furniture. The fabric is also water repellent to prevent stains making it a low-maintenance patio cushion. 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. AFTER-SALE GUARANTEE: The cushions are coming with 2 years full warranty, under normal weather and usage. Any problem about our product, please contact us by Amazon message directly. Please note in rainy or snowy days, put away the seat cushion, which can effectively prolong the service life of the seat cushion .
  • Pillow Perfect Outdoor/Indoor Forsyth Pool Square Corner Seat Cushions, 18.5
    Bestseller #1
    Pillow Perfect Outdoor/Indoor Forsyth Pool Square Corner Seat Cushions, 18.5" x 16", Turquoise, 2 Count (386)
      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 Attached ties keep outdoor cushion securely fastened to your outdoor patio furniture Easy Care - lightly spot clean or hand wash outdoor cushion fabric with mild detergent and cool water; then let air dry 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) Care Instruction: Spot Clean Only Fill Material: 100% Polyester Fiber Ultra-durable water- & fade-resistant outdoor polyester fabric protects fill material and is ideal for use on the patio or poolside; also suitable for indoor use
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