Flex Top California King Sheet Set (Split Top California King, flextop california king), 1800 Thread Count Egyptian Comfort

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 California King Sheets for Adjustable Beds

Our 1800 Series Split Top California King sheet set is designed for adjustable and flex-top mattresses where the top portion is split but the bottom remains connected. This allows independent head adjustment while keeping a 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 California King (Flex Top Cal 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 California 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 California King sheet?

Split Top California King sheets (also called Flex Top Cal King sheets) are made for mattresses where the top portion is split but the bottom remains connected. This allows independent head adjustment on an adjustable base.

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

A Split California King is two separate mattresses side-by-side, while a Split Top California King is one mattress with only the top portion split. The fitted sheet design is different, so choose the matching size.

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

Generally, no. Regular 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 California King / Flex Top Cal King sizing.

Split Top California King Sheets (Flex Top California King), 1800 Thread Count Ultra Comfort, Deep Pocket