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A 100% cotton sateen split king sheet set at 600 thread count, made from long-staple cotton and OEKO-TEX certified. It sits above the brand's 400 and 500 TC sets: denser, smoother and with a deeper sheen that softens with washing. The fitted sheet has all-around elastic and fits mattresses up to 16 inches deep, and the flat sheet has a double hemstitch. A solid pick for split king adjustable-bed owners who want crisp cotton rather than microfiber or blends.
In stockSold by California Design Den Inc.
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Lowest price we've seen: $89.99 on Nov 10 at Amazon. Tracked across 3 stores since Nov 10.
Rated 4.6 out of 5 across 459 ratings. Owners describe a substantial, smooth cotton sateen that softens after washing and fits deep split king mattresses well. Complaints center on the open-end pillowcases and some color variation from the photos.
A structurally balanced weight, smooth cotton sateen split king cotton sheet set— noticeably more refined and more substantial than the 400 or 500 TC, with a richer luminous sheen and a polished sleeping surface. A significant upgrade for those ready to feel a real difference. Our 600 TC Sheet Set holds the Good Housekeeping Seal — named Oprah Daily Sleep Award Winner 2026. Available in a full range of sizes and a curated palette of colors; colors may vary slightly between screen display and physical fabric. At 600 thread count, this split king size bed sheet set delivers a meaningful step up from both the 400 and 500 TC — denser, smoother, and more structured in feel. The polished surface carries a deeper, richer sheen that only develops further with washing, and the fabric softens into a refined, luxurious hand feel over time. This split king size sheet set is the optimal weight for most sleepers: substantial enough to feel truly different, well-suited for all seasons. Long-staple cotton fibers produce a finer, stronger yarn — smooth, with less pilling over time. Includes a flat sheet, deep pocket fitted sheet with all-around elastic, and pillowcases with simple open-end design (no envelope closure) Tested for shrinkage, pilling and fading. Machine wash warm and tumble dry low. Independently verified for true thread count authenticity (+/- 5% variance). The Good Housekeeping Seal is awarded only after products undergo rigorous testing by the Good Housekeeping Institute — an independent lab that evaluates quality, performance, and safety. Every item carries the OEKO-TEX STANDARD 100 certification — tested for harmful substances. California Design Den's cotton sheets have been featured in Architectural Digest, Good Housekeeping, and Forbes. Manufactured in a family-owned facility in India — 20+ years of cotton expertise.
