California Design Den 100% Cotton Sateen California King Sheet Set, White — 400TC, Deep-Pocket

These California King sheet sets from California Design Den are 100% long-staple cotton with a 400-thread-count sateen weave, designed for a smooth, breathable sleep surface that softens with each wash.

Made for larger beds and everyday home use, this 4-piece set includes a deep-pocket fitted sheet, a roomy flat sheet and two king-size pillowcases. Independently tested and awarded the 2026 Good Housekeeping Best Bedding Award, the set balances a polished, lustrous finish with durable construction and easy-care instructions.

How will these sheets fit my mattress and stay in place?

The fitted sheet is cut for California King dimensions with an all-around elastic grip that accommodates mattress depths from 8" to 16". That full-wrap elastic helps keep the corners secure through nightly movement and regular laundering.

• Fitted sheet finished size: 72" W x 84" L.
• Deep pocket design fits 8"–16" mattress heights.
• All-around elastic provides consistent hold at the edges.
• Top/bottom tags simplify correct placement when making the bed.

What feels different about the sateen cotton and how does it change over time?

The sateen weave creates a subtle sheen and a silky hand that contrasts with plain-weave cottons. These long-staple cotton fibers lend strength so the fabric keeps a polished touch, while repeated washing gently breaks in the feel for increased softness.

• 400-thread-count single-ply sateen for a smooth surface and light luster.
• Long-staple cotton offers durability with a softer finish over time.
• Breathable construction helps regulate comfort throughout the night.
• Designed to become softer wash after wash without losing structure.

How easy are these sheets to launder and maintain?

These sheets were created for regular home laundering and are tested against pilling, fading and shrinkage so you can care for them like other everyday bedding. Follow simple machine-wash and tumble-dry instructions to preserve the fit and finish.

• Machine wash warm; tumble dry low for best results.
• Tested for pilling, fading and dimensional stability.
• Removes softness and sheen with repeated washing—intended performance.
• Durable weave withstands routine laundering cycles.

What quality assurances and ethical practices back this set?

Independent labs verify the thread count within a small variance, and the set carries recognition from Good Housekeeping for everyday bedding performance. The brand also highlights responsible production, charitable donations and plastic-free shipping materials.

• 2026 Good Housekeeping Best Bedding Award winner and seal recipient.
• Thread count verification by independent testing (+/- 5% variance).
• Over 56,000 sheet sets donated across the U.S. in recent years.
• Shipped in recyclable, plastic-free packaging with ethical manufacturing practices.

Who is this for: This California Design Den 4-piece California King sheet set is aimed at sleepers who want a refined sateen look on a larger bed, prefer natural cotton that breathes, and need reliable ease-of-care. It's a practical choice for families, renters upgrading a master bedroom, and anyone seeking a lightweight, softening sheet that maintains a neat appearance and honest lab-verified specs.