California Design Den 600-Thread-Count King Sheet Set — White, 100% Long-Staple Cotton Sateen, Deep-Pocket

California Design Den Luxury 600 Thread Count King Size Sheets Set in White is a 4-piece, 100% long-staple cotton sateen collection designed for a smooth, durable, year-round sleep experience.

These king sheets combine a 600-thread-count sateen weave with single-ply long-staple cotton to deliver a soft, subtly lustrous feel that improves with washing. Independently tested for true thread count and awarded both the Good Housekeeping Seal and the Oprah Daily Sleep Award 2026, the set balances elegance and practical performance. The package includes a deep-pocket fitted sheet that stretches to fit mattresses from 8" to 16", a generous flat sheet, and two classic open-end pillowcases.

How do these sheets feel and perform night after night?

The sateen weave creates a smooth, slightly silky surface that retains a soft hand through repeated laundering. Because the cotton is long-staple and single-ply, the fabric resists pilling and maintains strength while remaining breathable for year-round comfort.

• 600 thread count sateen weave for smooth texture and light sheen
• Single-ply 100% long-staple cotton for durability and softness
• Gets softer with each wash while resisting pilling and fading

Will the fitted sheet actually stay put on my mattress?

The fitted sheet features an all-around elastic grip engineered to secure mattresses ranging from thin toppers to deep pillow-tops. The fabric and elastic are tested for shrinkage and fit retention, so the sheet keeps a smooth surface without constant tucking.

• Deep pockets fit mattresses 8"–16" thick
• All-around elastic for even, snug anchoring
• Top/bottom tags speed up correct placement when making the bed

How easy are these sheets to care for and how safe are they?

Care is straightforward: machine wash warm and tumble dry low, remove promptly to minimize wrinkles. Each piece is OEKO-TEX STANDARD 100 certified, indicating independent testing for harmful substances, and the collection earned the Good Housekeeping Seal after rigorous evaluation.

• OEKO-TEX STANDARD 100 certified for textile safety
• Machine washable; tumble dry low recommended
• Durability tested for shrinkage, colorfastness, and pilling

What exactly comes in the set and what are the dimensions?

This 4-piece white king set includes the main bedding pieces you need for a finished look: a generously sized flat sheet, a deep-pocket fitted sheet, and two king pillowcases. Sizes are provided so you can confirm compatibility with your mattress and pillow dimensions.

• Flat sheet: 112" W x 102" L
• Fitted sheet: 78" W x 80" L, fits 8"–16" mattresses
• Pillowcases: 21" W x 40" L, classic open-end style

Who is this for? These sheets are for sleepers who want a refined, hotel-like cotton sateen without excessive weight—people who value certified safety testing, long-term durability, and accurate product labeling. If you own a deep mattress or topper, prefer a smooth sheen over a matte finish, and want linens that soften over time, this set offers a reliable middle ground between plush richness and breathable cotton performance. California Design Den backs its transparency with independent verification of thread count and a production partnership with a family-run factory in India, while also contributing to community donations across the U.S.