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Cosybay

Cosybay Feather and Down Fiber Comforter Insert Twin, 100% Cotton Cover

  • Based on 4,468 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Oct 20
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Size: Twin


Seasons: All


Color: White


Features

  • Comforter for All Sizes & All Seasons/Extra Warmth: Available in a complete range of sizes to fit any bed, including Twin (68"x90"), Full (82"x86"), Queen (90"x90"), Oversized Queen (98"x98"), King (106"x90"), Cal King (104"x96"), and Oversized King (116"x98"). Our all-season comforter provides balanced medium warmth, lightweight yet cozy for year-round use, keeping you comfortable in warmer months and just warm enough in cooler seasons. We also offer an Extra Warmth version for extra insulation on cold winter nights.
  • Fluffy Feather & Down Fiber Filling for Hotel-Style Comfort: Filled with a balanced blend of feather and down fibers, this comforter delivers lasting fluffy loft and gentle insulation without excessive weight. No matter which size you choose, it brings a plush, hotel-style cozy feel to your bed, giving you a luxurious sleep experience right at home.
  • Ultra Soft 100% Cotton Shell OEKO-TEX STANDARD 100 Certified: Crafted with a high-density 100% cotton shell, this duvet insert feels soft, smooth, and breathable. OEKO-TEX STANDARD 100 certified, the cotton fabric is suitable for comfortable, everyday bedding use.
  • Durable Box Stitch Design with Corner Tabs: The box-stitch construction helps keep the filling evenly distributed and reduces shifting over time. Reinforced stitching enhances durability, while 4 corner tabs help keep the all season comforter securely in place inside a duvet cover.
  • Easy Care Comforter for Everyday Use: This bed comforter is vacuum packaged and regains its fluffiness after unpacking and gentle fluffing. Suitable for machine washing on a gentle cycle and tumble drying on low heat. Can be used as a standalone comforter or as a duvet insert.

Description

At Cosybay, we believe comfort begins at home. From goose down pillows to feather and down fiber comforters and easy-care down alternative bedding, every piece is designed to bring softness, warmth, and everyday relaxation to your bedroom. Inspired by family moments, we create cozy bedding for restful nights, quiet mornings, and the people and pets you love. Cosybay — Comfort crafted for better sleep. Cosybay bedding may arrive compressed. Gently shake, pat, and fluff after opening, then allow time to recover its natural loft before use. Choose a feather and down fiber comforter for a fuller, warmer feel, or a down alternative comforter for lightweight, easy-care everyday use. Select based on your preferred warmth, weight, and care needs. For washing, drying, fluffing, or daily care guidance, please check the care label and product details page before use. Use covers to reduce dust and stains. Shake and air out regularly to help keep bedding fresh between washes. Cradles your head & neck. Breathable, down-proof washable cotton delivers hotel-soft sleep support for bedrooms and dorms. All Aeason Duvet Insert Goose Down Pillow 1 Pack Goose Down Pillow 2 Pack Soft Bed Comforter Blue/Grey Comforter

Material: Cotton


Color: White


Brand: Cosybay


Special Feature: Durable, Hotel-Quality, Medium for 55–77℉, heavy for cold users & rooms under 64℉., OEKO-TEX Certified See more


Style: Modern


Color: White


Style Name: Modern


Blanket Form: Comforter


Theme: Plain


Pattern: Solid


Material Type: Cotton


Fill Material: feather down fiber


Weave Type: Plain


Product Care Instructions: Machine Wash


Fabric Type: 100% Cotton Fiber


Additional Features: Durable, Hotel-Quality, Medium for 55–77℉, heavy for cold users & rooms under 64℉., OEKO-TEX Certified


Recommended Uses For Product: All-Season Bedding, Bedroom Comfort, Guest Room or Master Bedroom, Hotel-Style Sleep, Layering


Seasons: All


Embellishment Feature: Box Quilted Design, Minimalist Luxury Style, Piping


Fabric Warmth Description: Medium/Heavyweight


Brand Name: Cosybay


Age Range Description: All


Team Name: Comforter


Number of Items: 1


Included Components: Comforter only


Model Name: Feather and Down Fiber Comforter Insert


Manufacturer: Cosybay


Number of Packs: 1


Item Type Name: duvets


Model Number: Comforter Insert


Manufacturer Part Number: Comforter Insert


Item Dimensions L x W: 90"L x 68"W


Size: Twin


Unit Count: 1 Count


Item Weight: 2.51 kg


Item Thickness: 3 inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • This is one great down comforter
Size: Queen Seasons: All Color: White
First night and this comforter is the perfect weight and warmth. It’s in a duvet and it’s heavy enough where it feels good but not super hot. After putting in the dryer when I got it, it fluffed up perfectly. I’m very impressed.
Reviewed in the United States on October 11, 2026 by Ken Hinman
    • Best Comforter on Amazon
Size: Queen Seasons: All Color: White
Best comforter I ever bought from Amazon. I did a lot of research before buying this comforter. As you know you never know what you’re gonna get with Amazon. Lol. I even returned one I got and didn’t like. But this one is very soft and fluffy. Not too warm in the summer but you can still curl up snug in winter. It’s 60/40 down but feels like 100. I’ve washed it my washer on gentle cycle and then let it line dry outside with no issues. Would definitely recommend ... show more
Reviewed in the United States on August 12, 2026 by Anthony Ruvolo
    • Love this product and will buy more.
Size: Twin Seasons: All Color: White
I bought two twin size for my grandkids’ duvet covers and these are really nice! They’re lower than kids love how fluffy their bedding is! The kids are cool in the summer and warm in the winter using these down and feather comforters.
Reviewed in the United States on August 9, 2026 by Sheri Dougherty
    • Good
Size: Queen Seasons: All Color: White
Bought this for my daughter, so here's her review: I like how it has a 100% cotton cover and down feather filling, tend to opt for natural fibers and materials so this was a great swap from a polyester comforter. Arrived in a vacuum-sealed plastic pouch and when I opened it- phew! It stinks! It smelled so bad. Washed it twice with laundry detergent and dried it in the dryer but man, it soaks up a lot of water. Had to dry it for like 4 hours. Tried to air it out on the balcony because it smelled even after the wash, which did help a little. Even covered it in baking soda for a couple hours and massaged it in, which also helped a little bit. Nowadays, I think I've grown nose blind to the smell so it doesn't bother me too much anymore. Appearance-wise, it's very nice. A nice bright white and not too thick or too thin, so truly great for all seasons (just pair with another blanket during the colder seasons). Easy to take care of, I don't really wash it anymore just put it in the dryer for like 20 minutes on low heat to fluff every week or two. Will probably wash once a year like I saw online (to preserve the feathers). It does shed. Sometimes the feathers will poke out through the comforter cover so I'll pull them out and use a lint roller to get the feathers off. Sometimes the feathers will poke me and it hurts a little but maybe I just need a thicker or better comforter cover. But you get what you pay for, it's not too bad for what it is. ... show more
Reviewed in the United States on July 12, 2026 by John D.
    • Perfect for children room
Size: Twin Seasons: All Color: Black
Review Image by Nichole Chartrand
Review Image by Nichole Chartrand
Review Image by Nichole Chartrand
This is perfect for kiddos, the size is accurate to a twin, I bought 3 all in black. I've had zero issues with them fitting a duve cover on them and staying on. The color is true to theboucure. They are comfortable, and the quality is great! They are not overly thick but will keep you warm (not hot or cool). They are easy to use. However the one down fall- when I read “feather down” I was expecting more of a fluffy duvet that feels more like a air hug like the others I had growing up. That was not the case. It's more like a normal comforter that you can place a duvet cover on. It feels more like cotton stuffing then feather stuffing. So if you are looking for the more traditional feel, then this is not for you. ... show more
Reviewed in the United States on February 3, 2026 by Nichole Chartrand
    • Awesome Comforter
Size: Twin Seasons: All Color: White
I purchased this comforter last minute for holiday guests arriving. It wasn't in my budget to spend a lot on a high quality comforter. 8 months later this comforter is a favorite! It fluffed up nicely right away and is perfectly warm for my cool coastal climate.
Reviewed in the United States on July 26, 2026 by nwbuyer
    • 10 Stars
Size: Twin Seasons: All Color: White
I would give this 10 stars if I could. The quality is soooo nice! Similar to things from Pottery Barn. Obviously the price is much nicer than theirs! Weight is fantastic, lining is soft, hooks for tying are very secure
Reviewed in the United States on August 3, 2026 by Sarah O.
    • Great quality, price and delivery!
Size: California King Seasons: All Color: White
Purchased the CalKing size mid weight in white and it was exactly what I was looking for to replace my existing one. Price was great, next day Prime delivery, quality and construction seem to be on point! I’m pretty particular about stuff and would definitely recommend!
Reviewed in the United States on July 27, 2026 by Noel Duarte

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