Split Top Flex Head Sheet Set 39ft Split for Adjustable Beds - Luxury

Our review of the SGI bedding 39' King Split Top Flex Head Sheet set finds it best suited to couples who use a top split adjustable bed and need a fitted sheet that stays secure while each side moves independently. The biggest reason to consider this set is its purposeful 39' split at the head of the fitted sheet combined with fully elasticized edges, which keeps the sheet in place during head and upper-body adjustments. The set also aims to deliver a soft, cooling feel thanks to Bio polishing and long staple yarns.

Key Features

• 39' Top Split Fitted Sheet: The fitted sheet is split 39' from the top so each side can flex independently on adjustable beds without pulling the sheet out of place.
• Complete 4-Piece Set: Includes one split head king fitted sheet 78' x 80', one king flat sheet 108' x 102' and two king pillowcases 20' x 40' for a full bedding solution.
• Fully Elasticized Fit: Durable elastic around the entire fitted sheet provides a secure fit and helps the sheet stay put during adjustments and nightly movement.
• Soft, Polished Cotton: Bio polishing and long staple yarns deliver a soft hand and a cooler sleeping surface that often improves with washing.
• Deep Pockets: The fitted sheet is made for deeper mattresses up to 15' to accommodate Sleep Number and other adjustable mattress systems with thicker profiles.

Who It's For

Buy this set if you own a top split flex-head adjustable king bed and need a fitted sheet that allows independent head adjustments without tugging or bunching. It is also a good match for those who prefer a traditional cotton feel with a soft finish and deeper pockets to fit modern mattress heights.

Look elsewhere if you need specialty performance fabrics (moisture-wicking synthetics) or expect heavy wear at seams from frequent high-heat washing, since a small number of customers reported seam issues after repeated laundering. Those wanting sateen sheen or very high thread count marketing may prefer different constructions.

Pros & Cons

Pros

• Purpose-built 39' split keeps each side independent on adjustable beds for comfortable, tangle-free head adjustments.
• Soft, bio-polished cotton feel that many users find improves after initial washes.
• Deep 15' pockets and fully elasticized edges offer a secure fit on thicker mattresses.
• Comes as a complete 4-piece set including two king pillowcases.

Cons

• Some users reported mixed comfort against the skin and occasional seam failure after repeated washing, so delicate care improves longevity.

Specifications

Set Contents	1 split head king fitted 78' x 80', 1 king flat 108' x 102', 2 pillowcases 20' x 40'
Split Width	39' split from top of fitted sheet
Material	100% Egyptian cotton (long staple yarns)
Thread Count	600 thread count
Pocket Depth	15' deep
Finish	Bio polished for softness and cooling

Our Verdict

The SGI bedding split top flex head sheet set is a practical, good-value choice for anyone with a split top adjustable king bed who wants a true 39' split and a snug, deep-pocketed fit. Its cotton construction and bio-polished finish provide a comfortable, cooler feel while the complete 4-piece arrangement covers standard needs-just follow the care recommendations to reduce wear at seams and prolong life.

Frequently Asked Questions

Will this fitted sheet work on a Sleep Number split king?
Yes, the 39' split and 78' x 80' fitted dimensions are designed to fit split king and flex top king beds including Sleep Number style beds.

How deep are the pockets and will they fit a tall mattress?
The fitted sheet offers 15' deep pockets, suitable for most thicker mattresses and adjustable systems with toppers.

What laundering care preserves softness and durability?
Machine wash warm, tumble dry low or medium, avoid bleach, remove before fully dry and fold gently; ironing if necessary helps maintain a smooth finish.