Extra Deep Split King Fitted Sheet - Fits 18"-24" Mattress, Cream Review (2026)

Who this sheet is built for

Split King mattresses, the two twin XL mattresses often used with adjustable bases, need fitted sheets sold individually rather than as a single King size sheet, since one continuous sheet cannot stretch across two separately moving mattress halves. This listing is sold as a single fitted sheet only, meaning buyers with a Split King setup need to purchase two, one for each half, matched by color. The 18 to 24 inch deep pocket targets thick mattresses, which is common on adjustable bases that stack a mattress on top of a motorized frame. Anyone with a standard one piece King mattress does not need this Split King specific sheet and should choose a regular King fitted sheet instead, since this one is cut and sized for two separate twin XL mattresses rather than one wide surface.

Fabric and pocket depth explained

The sheet is made from a double brushed fabric, a finishing process that brushes both sides of the material to soften the surface and give it a lighter, less crisp feel than plain cotton percale. This type of fabric is generally machine washable and resists tearing, shrinking and wrinkling better than cheaper, untreated microfiber blends, though exact fiber content is not listed for this particular sheet. The extra deep pocket, rated for mattresses from 18 up to 24 inches, uses elastic that runs the full perimeter of the sheet rather than just the corners, which helps it grip a thick mattress and resist the corners popping loose overnight the way a shallow pocket sheet does on a tall mattress. This all around elastic is a meaningful upgrade over corner only elastic sheets for anyone with a mattress topper adding extra height on top of an already tall mattress.

Living with it day to day

Because it ships as a single sheet, setup on a Split King bed means fitting one sheet per mattress half and matching a second sheet, sold separately, in the same cream color for a uniform look across the bed. The full perimeter elastic makes it easier to stretch the sheet over a mattress that is right at the top of the 24 inch range without the corners slipping off during the first few nights of use. Being machine washable, care is straightforward: a normal wash and tumble dry cycle, though as with most brushed fabric sheets, washing in cool or warm water rather than hot helps the fabric keep its softness and resist pilling over repeated washes. The main daily friction point on any Split King setup is the seam where the two mattress halves meet, since the two separate sheets cannot fully hide that gap the way a single King sheet does.

How it compares with other deep pocket sheets

Against the CGK Unlimited King fitted sheet in the same guide, which fits a standard one piece King mattress with the same 18 to 24 inch pocket depth, this sheet is the right pick only for Split King owners since a one piece King sheet cannot be used on two separate mattress halves. Compared with the Hearth and Harbor sheet set, which bundles a full six piece set rather than a single fitted sheet, this listing is narrower in scope, aimed at buyers who just need a replacement fitted sheet rather than a full new set. Against the gray King sheet also reviewed in this guide, which caps out at a 21 inch pocket, this Split King sheet's 24 inch maximum depth gives more headroom for very thick mattress and topper combinations.

Verdict and who should pick something else

This sheet is the right call specifically for Split King owners with a deep or adjustable base mattress who want soft, machine washable fabric and a pocket that will not pop loose on a tall mattress. Remember that a second sheet is needed to cover both mattress halves, and budget for that before checking out. Anyone with a standard one piece King mattress should pick a regular King fitted sheet instead, since this one is cut for two separate twin XL mattresses. Buyers who want a matching complete set with pillowcases and a flat sheet, rather than a single fitted sheet, should also look at a bundled sheet set instead of this individual piece.

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