Long, unhurried, properly filled. Rectangle cushions have a particular logic to them. Layered in front of square cushions on a sofa. Stretched along a bed head. Propped against the wall of a reading nook or rolled out in the back of a van. They're the cushions that finish a space — the ones that make a grouping look considered rather than thrown together. And a rectangle cushion is only as good as the insert inside it. Too small, and the cover collapses and wrinkles at the ends. The right size, and the whole thing holds its shape, fills the corners, and looks exactly as it should. Our rectangle feather cushion inserts are filled with certified humane, responsibly sourced down — the same natural fill as our square range. Available in three sizes built for the most common rectangle cover dimensions: • 55×35 cm — smaller rectangle, lumbar support, accent cushion • 85×45 cm — the mid-range. Long sofas, beds, generous layering Natural feather fill has a weight and loft that polyester approximates but never quite matches. It settles into a cover properly. It holds. And when you eventually replace it after years of good use, it biodegrades — rather than adding to a landfill. What to know • Certified humane product - responsibly sourced down • Biodegradable fill - natural materials, considered end of life • Natural loft that keeps corners filled and covers looking their best • Match insert size to cover size; size up by 5 cm for a plumper finish • Spot clean or dry clean; air regularly and give them a light shake • Not recommended for feather allergies Sizing guide Rectangle inserts need to reach the corners of the cover. That's the most important thing. A 55×35 cm insert in a 55×35 cm cover will sit correctly; going slightly over (say, 60×40 cm if you can find it) gives more plump. Never go smaller — a short or narrow insert will leave the ends of a rectangle cover empty and shapeless. Pair with Browse Pony Rider's rectangle cushion covers - from the Wanderful in overdyed canvas to the Lil Highlander in stonewashed canvas. Each rectangle cover is designed to hold its shape, age beautifully, and live wherever you do. Pair your insert and cover together at checkout. What sizes do the Pony Rider rectangle feather inserts come in? 55×35 cm, 85×45 cm - matching the most common rectangle cushion cover sizes in the Pony Rider range. Are the rectangle feather inserts ethically sourced? Yes. All Pony Rider feather inserts are certified humane products with responsibly sourced down. What insert size do I need for a 90×48 cm cushion cover? A 90×48 cm insert is the right match. This size fills the corners correctly and gives the cover its proper shape. If you want a slightly plumper result, look for a 95×50 cm insert. Can I use a rectangle feather insert for outdoor cushions? Feather inserts are designed for indoor use. For outdoor cushions, camping setups, or van life applications, a polyester insert is more practical - it handles moisture better and is machine washable. How do I care for a rectangle feather cushion insert? Spot clean as needed, or dry clean. Keep them dry, air them periodically, and give them a shake to redistribute the fill. Avoid machine washing - feather inserts don't tolerate it. What's the difference between a 55×35 cm and an 85×45 cm rectangle insert? The 55×35 cm is a compact lumbar-style insert - great for accent cushions, armchairs, and smaller sofas. The 85×45 cm is a proper long cushion insert for larger sofas, beds, and anywhere you want a generous horizontal line across your styling.
