--- product_id: 573087636 title: "Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch" brand: "cosybay" price: "¥27433" currency: JPY in_stock: false url: https://www.desertcart.jp/products/573087636-cosybay-california-king-size-feather-down-fiber-comforter-ultra-fluffy store_origin: JP region: Japan --- # Durable baffle box & double-needle hemming Ultra fluffy duck feather & down blend 104x96 inch California King size Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch **Brand:** cosybay **Price:** ¥27433 **Availability:** ❌ Out of Stock ## Summary > ☁️ Sleep Like You Mean It — Luxury Comfort Meets Everyday Elegance ## Quick Answers - **What is this?** Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch by cosybay - **How much does it cost?** ¥27433 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/573087636-cosybay-california-king-size-feather-down-fiber-comforter-ultra-fluffy) ## Best For - cosybay enthusiasts ## Why This Product - Trusted cosybay brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Baffle box design and reinforced corner tabs keep feathers evenly distributed and prevent shifting. - • **Cloud-Like Comfort:** Experience ultra-soft, breathable warmth with a premium duck feather and down fiber blend. - • **All-Season Versatility:** Perfectly balanced weight for year-round comfort, from summer nights to winter chills. - • **Generous California King Size:** Sprawling 104x96 inches to envelop your bed in luxurious coziness. - • **Certified Safe & Skin-Friendly:** OEKO-TEX STANDARD 100 certified cotton cover ensures a clean, odorless, and hypoallergenic sleep. ## Overview The Cosybay California King Comforter is a premium all-season duvet insert measuring 104x96 inches, filled with a luxurious blend of duck feathers and down fibers for ultra-soft, lightweight warmth. Featuring a breathable cotton cover and durable baffle box construction with corner tabs, it ensures even fill distribution and long-lasting comfort. OEKO-TEX certified for safety and skin-friendliness, this comforter offers a cloud-like sleeping experience ideal for any bedroom or guest room. ## Description Buy Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch: Duvets & Down Comforters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - 【Fluffy & Lightweight】Filled with a luxurious blend of duck feather fibers, duck feathers, and duck down fibers, Cosybay white duvet is ultra soft, lightweight, and breathable, providing a cloud-like sleeping experience. Sized at 104 X 96 inches, this lightweight CALIFORNIA KING duvet insert offers cozy warmth for a restful night's sleep. Ideal for bedroom, guest room, or hotel accommodations, this home collection offers luxurious bedding options. - 【Premium Materials Certified for Safety】Cosybay bedding duvets & down fibers comforters has passed STANDARD 104 by OEKO-TEX Certified. The cover/shell of comforter is cotton, which makes the comforter extra fluffy, breathable. Premium material guarantees high cleanness, odorless, low noice and skin-friendly feather comforter. - 【Durable & Exquisite Details】Premium baffle box design construction keeps down fibers and feathers evenly in place and resists from any leaking to ensure a stable and comfortable sleep. The four durable corner tabs prevent quilt from shifting inside duvet cover. Excellent double needle hemming design to ensure its longevity for years. - 【All Season Duvet Insert】Cosybay's classic all-season duvet, with the perfect weight and thickness, is designed for year-round use, ensuring comfort in both hot and cool weather. - 【Usage Care & Quality Assurance】It comes with vacuum packaging. Please gently tap and allow the comforter to sit for several hours to restore its original shape. Spot clean or dry clean if necessary. Your satisfaction is our top priority. Please feel free to contact us with any concerns, and we will spare no effort to solve the problems. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CFTJRNNF | | Age Range Description | Adult | | Best Sellers Rank | #1,988,280 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #909 in Bedding Duvets & Down Comforters | | Blanket Form | Comforter | | Brand Name | Cosybay | | Color | White | | Customer Reviews | 4.2 4.2 out of 5 stars (25) | | Fabric Type | Shell: Cotton | | Fabric Warmth Description | Lightweight | | Fill Material | Feather and Down Blend | | Item Dimensions L x W | 104"L x 96"W | | Item Weight | 4.02 kg | | Manufacturer | Cosybay | | Manufacturer Part Number | DFC W-CK | | Material Type | Cotton | | Model Number | DFC W | | Number of Items | 1 | | Pattern | Solid | | Product Care Instructions | Dry Clean Only | | Recommended Uses For Product | Quilt Blanket | | Seasons | All | | Size | California King | | Sport Type | Camping | | Style Name | Modern | | Theme | Plain | | Unit Count | 1 Count | | Weave Type | Plain | ## Product Details - **Blanket Form:** Comforter - **Brand:** Cosybay - **Color:** White - **Material:** Cotton - **Style:** Modern ## Images ![Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch - Image 1](https://m.media-amazon.com/images/I/71GuLUbWlsL.jpg) ![Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch - Image 2](https://m.media-amazon.com/images/I/61xAE+OyU2L.jpg) ![Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch - Image 3](https://m.media-amazon.com/images/I/717UiGaqDoL.jpg) ![Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch - Image 4](https://m.media-amazon.com/images/I/71f5a1yU7OL.jpg) ![Cosybay California King Size Feather Down Fiber Comforter Ultra Fluffy Duvet Insert, All Season White Cotton Cover Luxury Hotel Bed Comforter with Corner Tabs, 104x96 Inch - Image 5](https://m.media-amazon.com/images/I/71fegocdLiL.jpg) ## Questions & Answers **Q: IS IT BREATHABLE?** A: The Cover/Shell of Comforter is Cotton, Which Makes the Comforter Extra Breathable. **Q: WHAT SEASON CAN I USE IT IN?** A: Cosybay's Classic All-Season Duvet is Designed for Year-Round Comfort, Providing Warmth in Both Hot and Cool Weather. **Q: MEASUREMENTS & DIMENSIONS?** A: Twin 68"x90" ,Full 82"x86" ,Queen 90"x90" ,CAL King 104"X96" , King 106"X90" , Oversized Queen 98"X98",Oversized King 116"X98". --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/573087636-cosybay-california-king-size-feather-down-fiber-comforter-ultra-fluffy](https://www.desertcart.jp/products/573087636-cosybay-california-king-size-feather-down-fiber-comforter-ultra-fluffy) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-22*