--- product_id: 104209804 title: "Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate" brand: "casper" price: "¥2525" currency: JPY in_stock: false reviews_count: 13 url: https://www.desertcart.jp/products/104209804-casper-sleep-soft-and-durable-supima-cotton-sheet-set-king store_origin: JP region: Japan --- # Extra-long staple cotton 400 thread count Breathable percale weave Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate **Brand:** casper **Price:** ¥2525 **Availability:** ❌ Out of Stock ## Summary > Sleep Like Royalty 👑 ## Quick Answers - **What is this?** Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate by casper - **How much does it cost?** ¥2525 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/104209804-casper-sleep-soft-and-durable-supima-cotton-sheet-set-king) ## Best For - casper enthusiasts ## Why This Product - Trusted casper brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crisp Comfort:** Experience the cool, breathable percale weave that keeps you comfortable all night long. - • **Designed for You:** Proudly designed in the USA, these sheets elevate your sleep experience with premium materials. - • **Luxury Redefined:** Indulge in the ideal 400 thread count for the perfect balance of softness and strength. - • **Wash & Wear Wonder:** Get softer with every wash—no pilling or thinning, just pure comfort. - • **Unmatched Durability:** Crafted from 100% Supima cotton, these sheets are four times stronger than the industry average. ## Overview The Casper Sleep Soft and Durable Supima Cotton Sheet Set in King size offers a luxurious sleep experience with its 100% Supima cotton construction, featuring a breathable percale weave and an ideal 400 thread count. Designed in the USA, these sheets promise unmatched durability and comfort, getting softer with every wash. ## Description Before designing our sheets, we had to rethink everything we thought we knew. We learned that a higher thread count doesn't mean higher quality, you can't cut corners when it comes to cotton, and the right weave makes a world of difference. Our result sheets that are the perfect balance of soft, crisp, and airy. Instead of obsessing over the number of threads, we focused on finding the right thread count for our specific cotton and weave choices. A high thread count sounds fancy, but more threads can actually make sheets heavier and less breathable. We landed on 400 two-ply threads — a modest number that makes a big difference. We chose a lightweight percale weave because it's proven to last longer and breathe better than any other. It features a classic one-over-one pattern that will give you cool, crisp comfort for nights on end. Supima is one of the longest cotton fibers in the world. It’s 35Percent longer and 45Percent stronger than regular Cottons, which means the fiber is even softer and more lustrous wash after wash. It's a big part of what makes the Casper sheets naturally soft. The Supima cotton used in Casper sheets comes from a farm in California central Valley. Our sheets are certified Supima cotton and Oeko-Tex 100 certified, which is the highest standard that s the sheets are safe enough for babies and children. The Casper sheets are designed in the USA; spun, woven and sewn in India, and made with Supima cotton from California. These sheets will fit any mattress up to 14 inches high. ## Features - 100% Cotton. Includes 1 flat & fitted sheet, and 2 pillowcases - Extra-long Staple Supima Cotton - Four times stronger than the industry average and one of the finest and longest fibers in the world. It won‚Äôt pill or wear thin ‚Äî it will only get softer with every wash - Breathable Weave - Percale is a lightweight weave proven to last longer and breathe better than any other. It features a classic one-over-one pattern that will give you cool, crisp comfort for nights on end - Ideal Thread Count - 400 two-ply threads for the perfect balance of softness, strength, and breathability - Sheets Materials & Construction - The Casper sheets are designed in the USA with 100% Supima cotton from California ## Images ![Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate - Image 1](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/71Q4sIfI3OL.jpg) ![Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate - Image 2](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/31hLWpQv42L.jpg) ![Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate - Image 3](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61GMsxgescL.jpg) ![Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate - Image 4](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/91IT3g6zRjL.jpg) ![Casper Sleep Soft and Durable Supima Cotton Sheet Set, King, Grey/Slate - Image 5](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81v737to6LL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Crisp, smooth,cool, lightweight sheets. *by R***E on Reviewed in the United States on June 2, 2018* I've been looking for a long time for the perfect smooth, crisp percale sheets, and I decided to give these a try. Upon their arrival, I was disappointed as they seemed too soft and thin. That was before I took them out of the lovely pouch they come in. I took them out of their packaging and found they were wonderfully smooth to the touch. I hated to ruin that beautiful smoothness, but because they had an odor I washed them (in cold water and dried them on a cool setting). As I expected of percale, they were pretty wrinkled. Mostly they were small wrinkles, except for the colored hems, which were very wrinkled. After ironing them (I have always ironed percale, as cotton percale always wrinkles), they came out very smooth. As soon as I shook the top sheet over the bed to put it on, I knew I would like these sheets. It made the right noise, just as good percale should snap when you shake it out hard. They are as described: smooth, crisp, lightweight. I would love it if the bottom sheet was made heavier, more the weight of my old ones, like the percale one could find before sateen finish and microfiber came around. These are very well made lightweight percale sheets, though. I feel cool and very comfy lying in between them. The bottom sheet is a bit too small for my 10" mattress, though. The colored edge doesn't go quite over the sides, but does tuck in far enough under my 10" mattress. Perhaps in time the sheet will stretch.The elastic is extremely good quality, also. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Best ever fit on my Q bed! *by M***A on Reviewed in the United States on April 20, 2023* These sheets has the BEST heavy duty elastic on the fitted sheet. I have a deep 15” mattress and these sturdy bottom sheets fit and don’t slide off!! I love this. They wash well, and feel great! I ordered 1 set, then had to get a 2nd set! Again…sturdy heavy duty elastic on bottom sheet!! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars The real thing *by J***S on Reviewed in the United States on May 18, 2022* These are the genuine Casper supima sheets. I was worried having read reviews but they are absolutely authentic ! I personally love them more than any sheet I’ve ever slept on, crisp yet soft and cool. This is my 2nd set and they’re SO NICE I was so excited to get new ones ! They fit the Casper bed like a glove, they’re a must have and worth every penny of the price. Casper is the BEST --- ## 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/104209804-casper-sleep-soft-and-durable-supima-cotton-sheet-set-king](https://www.desertcart.jp/products/104209804-casper-sleep-soft-and-durable-supima-cotton-sheet-set-king) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-09*