Split Top King Sheet Set (Flex), 1800 Thread Count Ultra Comfort, Deep

Size:

Twin XL Sheet Set includes:

1 Twin XL Fitted Sheet 39” x 80” x 16”
1 Twin Flat Sheet 69” x 100”
2 Queen Pillowcases 20” x 28”

Full Sheet Set includes:

1 Full Fitted Sheet 54” x 75” x 16”
1 Full Flat Sheet 92” x 100”
2 Queen Pillowcases 20” x 28”

Queen Sheet Set includes:

1 Queen Fitted Sheet 60” x 80” x 16”
1 Queen Flat Sheet 94” x 104”
2 Queen Pillowcases 20” x 28”

Olympic Queen Sheet Set includes:

1 Olympic Queen Fitted Sheet 66” x 80” x 16”
1 Queen Flat Sheet 94” x 104”
2 Queen Pillowcases 20” x 28”

Split Queen Sheet Set includes:

2 Split Queen Fitted Sheet 30” x 80” x 16”
1 Queen Flat Sheet 94” x 104”
2 Queen Pillowcases 20” x 28”

Split Top Queen Sheet Set includes:

1 Split Top Queen Fitted Sheet 60” x 80” x 16”
1 Queen Flat Sheet 94” x 104”
2 Queen Pillowcases 20” x 28”

King Sheet Set includes:

1 King Fitted Sheet 76” x 80” x 16”
1 King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Split King Sheet Set includes:

2 Twin XL Fitted Sheet 39” x 80” x 16”
1 King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Split Top King Sheet Set includes:

1 Split Top King Fitted Sheet 78” x 80” x 16”
1 King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

California King Sheet Set includes:

1 California King Fitted Sheet 72” x 84” x 16”
1 California King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

California King Sheet Set includes:

1 California King Fitted Sheet 72” x 84” x 16”
1 California King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Split California King Sheet Set includes:

2 Twin XXL Fitted Sheet 37” x 84” x 16”
1 California King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Split California King Sheet Set includes:

2 Twin XXL Fitted Sheet 37” x 84” x 16”
1 California King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Split Top Cal King Sheet Set includes:

1 Split Top Cal King Fitted Sheet 72” x 84” x 16”
1 King Flat Sheet 108” x 104”
2 King Pillowcases 20” x 36”

Wyoming King Sheet Set includes:

1 Wyoming King Fitted Sheet 84” x 84” x 16”
1 Wyoming King Flat Sheet 115” x 115”
2 King Pillowcases 20” x 36”

1800 Series Split Top King Sheets for Adjustable Beds

Our 1800 Series Split Top King sheet set is designed for adjustable and flex-top mattresses where the top portion is split but the bottom remains connected. This lets each person adjust their side independently while keeping a clean, unified fit at the foot of the bed.

With a fully elasticized deep-pocket fitted sheet and a secure, stay-put fit, this set helps reduce shifting and bunching during adjustments, while delivering the soft, cozy comfort the 1800 Series is known for.

Key Features

Designed specifically for Split Top King (Flex Top King) mattresses
Soft, cozy feel for comfortable sleep in any season
Balanced Percale Weave — 1800 Thread Count: 180 threads with 10 multi-ply yarn for a soft, lightweight feel that’s strong, breathable, hypoallergenic, and easy to care for
Premium microfiber — finely woven for softness, wrinkle resistance, and easy care
Deep-pocket fitted sheet with fully elasticized edge
Fits oversized and pillow-top mattresses up to 16" deep
Wrinkle-resistant finish for a smooth look with minimal effort
Durable construction designed for frequent washing and everyday use
Machine washable in cold water; tumble dry low
100-night return policy
Designed & packaged in California
OEKO-TEX® Standard 100 certified

If you need Split Top King sheets that fit correctly on an adjustable bed and stay comfortable night after night, the 1800 Series is a reliable choice.

FAQ's

What is a Split Top King sheet?

Split Top King sheets (also called Flex Top King sheets) are made for mattresses where the top portion is split but the bottom remains connected. This lets each person adjust their head independently on an adjustable base.

What’s the difference between Split King and Split Top King?

A Split King is typically two Twin XL mattresses side-by-side, while a Split Top King is one mattress with only the top portion split. This difference affects the type of fitted sheet you need.

Can you use regular King sheets on a Split Top King bed?

Generally, no. Regular King fitted sheets aren’t designed for the split at the head and can bunch or pull when the bed adjusts.

Do these sheets fit deep mattresses?

Yes. The fitted sheet is designed for mattresses up to 16" deep.

What are the 1800 Series sheets made from?

They’re made from premium microfiber, selected for softness, durability, wrinkle resistance, and easy care.

Are these compatible with Sleep Number beds?

Yes, if your Sleep Number mattress uses Split Top King / Flex Top King sizing.

Do you offer bundle pricing?

Yes. Bundle pricing is available and often lowers the cost per set compared to buying sets individually.

Split Top King Sheet Set (Flex), 1800 Thread Count Ultra Comfort, Deep Pocket