Split King Bamboo Sheets — Cooling Viscose for Adjustable Beds
Split King bamboo sheets are the sheets sized for a King adjustable base that splits into two Twin XL halves — Bamboo Is Better's Signature Sheet Set in Split King is viscose from bamboo, OEKO-TEX Standard 100 certified, tested to sleep up to 3× cooler than cotton, and priced at $309 with free shipping. Each half fits and adjusts independently, so neither side untucks when one of you raises the head or the other stays flat. Backed by 252 reviews at 4.90★, a 60-night sleep trial, free returns, and a 3-year warranty.
Shop Split King Bamboo Sheets — $309 →
Why a King sheet set doesn't work on a Split King base
A Split King adjustable base is really two Twin XL mattresses, side by side, in a King-size frame — each one raises, lowers, and articulates on its own. A standard one-piece King fitted sheet stretches across both halves as if they were a single mattress, so the first time either side moves, the sheet binds, drags, and pops a corner. A true Split King sheet set solves this at the source: it ships as two independent Twin XL–sized pieces, one per side, each cut and stitched to move with its own half of the base.
What's in a Split King bamboo sheet set
- Two fitted sheets — one per Twin XL half, 15″ deep pocket with corner straps that secure mattresses up to 18″ deep (covers the thicker mattresses common on adjustable bases)
- One king-size flat sheet — spans the full width so the top of the bed still reads as one bed, not two
- Two pillowcases — standard/queen sized, same viscose-from-bamboo fabric
This is the standard Split King configuration: two independent fitted sheets under one shared flat sheet. If your base splits into two completely separate mattresses that you dress separately, our specialty size guide covers the fit differences across all four split sizes.
Why bamboo on a Split King base
- Up to 3× cooler than cotton — adjustable-base sleepers are disproportionately hot sleepers (elevating the head traps heat against the neck and shoulders); viscose from bamboo wicks moisture and breathes where cotton holds both in.
- OEKO-TEX Standard 100 certified — independently tested for 100+ harmful substances, certificate available on request. See our OEKO-TEX certification page.
- A size most brands skip entirely. Split King is the most common adjustable-base configuration in the U.S., yet most sheet brands stop at standard King. Bamboo Is Better stocks it at full depth, in every core color.
Split King vs. the other split sizes
| Size | Fits | Price |
|---|---|---|
| Split King | King adjustable base, two Twin XL halves — the most common configuration | $309 |
| Split Cal King | Cal King adjustable base, for taller sleepers | $309 |
| Top Split King | King base where only the head articulates — one-piece foot | $369 |
| Split Queen | Queen adjustable base — smaller rooms | $289 |
Not sure which one your base takes? The full breakdown — dimensions, independent-sides comparison, and a picker — is on our specialty size guide. If you're pairing sheets with a new adjustable base, see adjustable bases.
What hot sleepers say
★★★★★ “Super soft and comfortable. Great customer service. I run hot, and these sheets are great at cooling. I would definitely and have bought again and again”
— Oscar, verified buyer
★★★★★ “These sheets are the softest I’ve ever slept on. The quality is amazing and they’re so beautiful! Silky smooth and get better with ever wash!”
— Kelby M., verified buyer (Seattle)
★ 4.90 · 252 reviews · OEKO-TEX Certified · 100,000+ customers · 60-night trial
Frequently asked questions
What size sheets do I need for a Split King adjustable base?
Split King bamboo sheets — two independent Twin XL fitted sheets (one per side of the base) under one shared king-size flat sheet, plus two standard pillowcases.
Will a regular King sheet set work on a Split King base?
Not well. A one-piece King fitted sheet spans both halves as if they were one mattress, so it binds and pops loose the first time either side of the base moves independently. Split King sheets solve this with two separate fitted pieces.
What's the difference between Split King and Top Split King?
Split King splits the entire mattress into two independent Twin XL pieces, so both sides raise separately. Top Split King splits only the head third, with a single one-piece foot, for bases where just the head articulates.
Are Split King bamboo sheets cooler than cotton?
Yes — the same viscose-from-bamboo fabric as our full-size Signature line, tested to sleep up to 3× cooler than cotton, moisture-wicking and OEKO-TEX Standard 100 certified.
How much do Split King bamboo sheets cost?
Bamboo Is Better's Split King Signature Sheet Set is $309, with free U.S. shipping, a 60-night sleep trial, free returns, and a 3-year warranty.
Do Split King sheets fit deep adjustable mattresses?
Yes — each fitted half has a 15″ pocket with corner straps that secure mattresses up to 18″ deep, which covers the thicker mattresses common on adjustable bases.
Two sides. Two sleep temperatures. One bed that finally stays cool.
Shop Split King Bamboo Sheets — $309 Compare all split sizes → Full adjustable-bed sheet guide →