Cottingon 4 Piece California King Sheets - Extra Long Staple Cotton

Our review of the Cottingon 4 Piece California King Sheets finds a practical, comfortable sheet set for owners of adjustable or split top king mattresses. The biggest reason to buy is the tailored split-top fitted design with full 360 elastic that keeps each side secure on Sleep Number, flex top, or split king beds while preserving independent movement. Made from OEKO-TEX certified 100% extra long staple Egyptian cotton, these sheets aim to combine breathable softness and durability for nightly comfort that improves after a few washes.

Key Features

• Fabric: OEKO-TEX certified 100% extra long staple Egyptian cotton provides breathable softness that becomes silkier after washing.
• Split-top design: The half split 34in down fitted sheet allows each side of an adjustable or split king mattress to move independently without tugging.
• Secure fit: Full 360 elastic and extra wide elastic edges keep the fitted sheet snug on mattresses up to 16in deep.
• Complete set: The four-piece set includes two pillowcases, one flat sheet, and one half split fitted sheet sized for California king beds.
• Easy care: Machine wash cold or lukewarm and tumble dry low; fabric softens with repeated washing for a silkier hand.

Who It's For

The Cottingon California king set is best for sleepers using adjustable beds, Sleep Number mattresses, or split-head/flex-top king configurations who need a fitted sheet that accommodates movement without bunching or coming loose. It also suits anyone who prefers breathable natural cotton and a softer feel that improves with washing.

Those who want sateen sheen or a distinct thread-count marketing detail should look elsewhere, as the emphasis here is on extra long staple Egyptian cotton and functional fit rather than glossy finish. If you need deep-pocket sheets for mattresses deeper than 16in, consider a different set designed for deeper depths.

Pros & Cons

Pros

• Well suited to adjustable and split king beds thanks to the half split fitted design.
• Soft, breathable 100% extra long staple Egyptian cotton that becomes softer with washing.
• Full 360 elastic keeps sheets secure on mattresses up to 16in deep without frequent readjusting.
• Good value for a practical four-piece California king set that includes two pillowcases.

Cons

• Fabric feel receives mixed feedback from some customers who expected a different texture on first use.
• Not specified for mattresses deeper than 16in, so may not fit very deep pillow-top models.

Specifications

Our Verdict

The Cottingon California king sheet set is a sensible pick for adjustable and split king mattress owners who want natural cotton comfort and a fitted sheet that stays put. It pairs practical design with breathable, soft Egyptian cotton and represents solid value for anyone needing a tailored split-top solution up to 16in deep.

Frequently Asked Questions

Will these sheets fit a Sleep Number split king?
Yes, the half split fitted sheet is designed to fit Sleep Number and other split king or flex top beds while allowing independent movement.

How deep a mattress will these sheets fit?
The full 360 elastic and extra wide edging secure the fitted sheet on mattresses up to 16in deep.

How should I wash these sheets?
Machine wash cold or lukewarm and tumble dry low; avoid high heat and bleach, and the cotton will soften after a couple of washes.