Fixwal Pack of 4 18×18 Outdoor Waterproof Pillows Inserts, Square Stuffer Pillow Form for Patio, White

I was skeptical about the description stating to buy a 20” insert for an 18” cover but I shouldn’t have been! DO follow those guidelines as I technically ordered the wrong size, BUT I opted to just keep them because I actually only needed two so I use two inserts in each pillow cover. This creates a very slightly overstuffed pillow appearance (which I like, as it presents a nice fullness I otherwise wouldn’t get with just one of these). They come vacuum packed so they arrive VERY flat but fluff up decently with a cycle in the dryer (not super full, but okay for decorative purposes). If I’d ordered the proper size I probably wouldn’t be as pleased with just one insert in each cover. I like a really full pillow, though, so that’s personal preference. They seem to be good quality with identical measurements for all four, the seams appear well sewn, they perform their purpose well, and I’m guessing the water resistance is good because none of them have shown any sign of mold or mildew even after getting snowed on and later blowing off my porch in a thunderstorm & getting wet several times. I didn’t think to remove them from the cover to dry out because my covers are supposedly water resistant plus I sprayed an extra layer of water resistant coating on each cover. If I ever need to buy them again, I might spray these as well just to double-protect against mold/mildew just in case. At this price point, though, these seem to be a great value for the money so I’d be okay with replacing them every few years if needed. (In that sense, it’s like replacing a bed pillow which is a normal necessity but bed pillows cost more.) I use these on my front porch year-round, change covers frequently for holidays & seasons, and I am very pleased with them after maybe 6 months of use.