California Design Den Split King Sheets 5-Pc Set White — 800TC 100% Long-Staple Cotton Sateen

These are a 5-piece, 800-thread-count, 100% long-staple cotton sateen split king sheet set designed for two separate twin XL mattresses and a single king top sheet and pillowcases.

California Design Den’s split king sheets combine a hotel-style satin sheen with a substantial, breathable cotton feel. The set is tailored for adjustable beds or split mattresses: it includes a full-width king top sheet, two fitted twin XL bottoms with gripper elastic, and two oversized king pillowcases. OEKO-TEX STANDARD 100 certification and independent thread-count verification back the product’s quality claims, while the heavier sateen weave provides a plush sensation that softens further with each wash.

How do these sheets fit split king or two-twin-XL mattresses?

The set is built specifically for split configurations rather than a single split-top king mattress. It includes one king-sized top sheet that spans both mattresses and two fitted twin XL bottoms that slip on each mattress individually. Tags labeled "top" and "bottom" make bed-making straightforward.

• Top sheet: 112" W x 102" L covers both mattresses.
• Fitted sheets: 39" W x 80" L each, fits 8"–15" mattress depths.
• Gripper elastic reduces slipping on adjustable or moving beds.
• Top/bottom tags simplify alignment and installation.

What is the fabric like and how will it feel against skin?

Made from single-ply, long-staple cotton in an 800-thread-count sateen weave, the fabric offers a soft, luxurious hand with a subtle luminous finish. The cloth is heavier than lightweight sheeting but remains breathable, delivering a smooth, nearly silky surface without synthetic fibers.

• 100% long-staple cotton for durability and softness.
• Sateen weave produces a silky sheen and smooth touch.
• Weightier feel that stays comfortable year-round.
• Becomes softer with each machine wash.

How should I care for the sheets to keep them looking and feeling great?

These sheets are machine washable and are designed to resist pilling, fading, and excessive shrinkage when cared for according to the label. Washing warm and tumble-drying low will preserve the fabric’s hand and finish; removing promptly reduces wrinkles and keeps the sateen sheen consistent.

• Machine wash warm; tumble dry low recommended.
• Remove promptly from dryer to minimize wrinkles.
• Lab-tested for pilling, fading, and shrinkage tolerance.
• OEKO-TEX STANDARD 100 certified for harmful-substance safety.

What quality assurances and ethical standards does the brand provide?

California Design Den verifies thread count through independent testing and highlights responsible manufacturing practices. The brand also donates bedding and emphasizes durability so items last longer, reducing replacement frequency and waste.

• Independent lab verification of thread count (±5% variance).
• OEKO-TEX STANDARD 100 safety testing for chemicals.
• Durability claims supported by lab testing for pilling and fading.
• Proven donation program and a track record since 2017.

Who is this for: This set suits sleepers who use a split king configuration or adjustable beds and want the look and feel of high-end hotel bedding. It’s a good choice for couples with different mattress needs, anyone seeking a heavier, long-lasting cotton sateen, or shoppers who prioritize verified thread count and certified material safety. If you need a traditional single fitted king (one piece for the bottom) rather than two fitted twin XL bottoms, consider a standard king set instead.