Before you buy
Will these fit my Sleep Number FlexTop King?
Yes — that's exactly what this cut is for. Split Top King (Sleep Number calls it FlexTop King) has one fitted sheet with a split upper half, so each side of the head can raise independently while the foot stays joined. The 17" pockets and corner straps handle the extra height of a pillow-top Sleep Number plus a mattress pad — the stack that pops standard 15" sheets off the corners.
How is this different from Sleep Number's own Lyocell Ultra sheets?
Three published differences. Fiber: ours is 100% bamboo viscose; Sleep Number's fitted sheet is 68% lyocell / 27% cotton / 5% elastane, and their flat sheet and pillowcases are 70% lyocell / 30% cotton. Pocket depth: 17" vs up to 15". Price: $169.95 vs about $350 for a FlexTop King set (sleepnumber.com, July 2026). Both are 300-thread-count sateen and OEKO-TEX certified. We are not affiliated with Sleep Number.
What split depth are these?
One universal cut — we don't sell separate 28"/32"/36" split SKUs. The fitted sheet splits at the head, and the seam is placed to clear the articulation fold on standard split-head bases (Sleep Number FlexTop, Reverie, Tempur-Pedic Ergo). If your base is unusual, the 100-night trial applies: put them on the bed and see.
Does this work with a Reverie / Tempur-Pedic Ergo / Purple base?
Yes. Any split-head adjustable base uses the same geometry: one mattress, split at the top. If your mattress splits at the head only, Split Top King is your size. If you have two separate Twin XL mattresses, order Split King instead — it ships with two Twin XL fitted sheets.
Why are you cheaper than Cozy Earth and ettitude?
Our sateen is woven in an OEKO-TEX certified mill that also produces bedding for premium labels. We sell factory-direct in bundles — no wholesale cut, no retail floor, no celebrity ad budget. The fabric spec is the same; the receipt is not.
Is it really the same fabric?
100% viscose from bamboo, 300-thread-count sateen weave, OEKO-TEX STANDARD 100 certified (every yarn, dye, and finish independently lab-tested). Compare the spec table above line by line — that is the whole story.
Will they fit my adjustable / split base?
Yes. Split King fits two Twin XL bases; Split Top King has a single fitted bottom with a split upper half that flexes with independent head positions. All cuts have 17" deep pockets and corner straps.
What's in the box?
1 flat sheet, 1 fitted sheet, 2 pillowcases. 3-packs add a free 300TC bamboo eye mask ($40); 6-packs add the mask plus a color-matched pillowcase set ($75 in gifts) — added to your cart automatically, while supplies last.1 flat sheet, 1 fitted sheet, 2 pillowcases. 3-set bundles add a free 300TC bamboo eye mask ($40); 7-set bundles (buy 4, get 3 free) add the mask plus a color-matched pillowcase set ($75 in gifts) — added to your cart automatically, while supplies last.
What if I don't love them?
Sleep on them for up to 100 nights. Not the coolest, softest sheets you've owned? Full refund — no restocking fees; you just cover the return postage. Plus a 5-year warranty against pilling and workmanship defects.
How do I wash them?
Cold wash, tumble dry low or line dry. Skip fabric softener — it coats the fibers and reduces breathability. They get softer wash after wash; tested past 200 cycles.
Why are you cheaper than Cozy Earth and ettitude?
Our sateen is woven in an OEKO-TEX certified mill that also produces bedding for premium labels. We sell factory-direct in bundles — no wholesale cut, no retail floor, no celebrity ad budget. The fabric spec is the same; the receipt is not. (Neither brand offers a Split Top King, which is why they're not in the table above.)
BAMBOO SHEETS 101
Do bamboo sheets really sleep cooler than cotton?
Yes. Bamboo viscose fibers are naturally breathable and wick moisture away faster than cotton, so the micro-climate under your covers stays cooler and drier — which is why hot sleepers and anyone dealing with night sweats gravitate to them. Weave matters too: our 300TC sateen stays smooth and cool without the clammy feel of polyester 'cooling' sheets.
Is 'bamboo viscose' actually bamboo?
Yes — viscose from bamboo (also called bamboo rayon) is the regulated name for fabric made by dissolving bamboo pulp and spinning it into fiber. Ours is 100% bamboo viscose, no polyester blended in — worth checking on any 'bamboo' sheet, since many are 30–40% polyester in the fine print. The finished fabric is OEKO-TEX Standard 100 tested: every yarn, dye, and finish, lab-verified free of harmful residues.
Do bamboo sheets pill or wrinkle?
Cheap bamboo can pill within 20 washes — it's the most common complaint on budget sets. Ours is long-staple viscose tested past 200 wash cycles with no pilling or thinning, and it's backed by a 5-year warranty against exactly that. Wrinkles: bamboo drapes rather than creases, so straight out of the dryer it looks noticeably smoother than crisp cotton percale.
How long do bamboo sheets last?
With cold washes and low-heat drying: years. Our fabric is tested past 200 wash cycles — roughly four years of weekly washing — without pilling or thinning, and carries a 5-year workmanship warranty. High heat is the main thing that kills any bamboo sheet; skip it and they actually get softer with every wash.
Are bamboo sheets good for sensitive skin and allergies?
Yes. The smooth, rounded fiber is naturally hypoallergenic and lower-friction than cotton — gentler on skin and hair — and its moisture-wicking keeps the bed drier, which discourages dust mites and bacteria. OEKO-TEX Standard 100 certification means the fabric is lab-tested safe for direct skin contact; many customers with eczema or easily irritated skin tell us it's the difference they notice first.
Are bamboo sheets eco-friendly?
Bamboo the plant is about as good as it gets — it grows up to three feet a day with no pesticides or irrigation and regrows from its own roots after harvest. The honest caveat: turning it into viscose takes real chemistry, which is why the mill matters. Ours is OEKO-TEX certified, with every batch tested for harmful residues in the finished fabric.
ABOUT THE COMPANY
Who's actually behind Overstock Sheet Club?
Two brothers who started selling sheets out of a California garage and still run the company day to day — tech, ops, containers, customer service. We sold over $100,000 of sheets our very first December, outgrew our first 1,800 sq ft warehouse in 2017, and today ship from an 8,000+ sq ft home base in Houston, TX. No investors, no celebrity founder — reorders and word of mouth fund our growth.
How are your prices this low? What's the catch?
No catch — four boring choices. We buy from the same OEKO-TEX certified mills that supply the $300+ luxury labels (no logo tax). We hand-load our containers floor-to-ceiling instead of using pallets — about 30% more sheets per container and 22% lower freight per set, repeated on every one of our 48 containers so far. We sell direct with zero retail layers. And we spend almost nothing on marketing — no ambassadors, no agencies. The ad budget we don't spend is the discount you see.
Who makes the sheets?
The same 20-person factory crew has cut, sewn, and quality-inspected our sheets for eight years — audited at every step, at a mill that earned OEKO-TEX certification after a year of work. Before settling on them we toured mills in Italy, Portugal, and India, including the factory that weaves $1,000-a-sheet luxury linens. The quality was equal; the lead times weren't. We don't switch suppliers to chase pennies — we improve the product with people we trust.
Where does my order actually ship from?
One location, one zip code: our own warehouse in northwest Houston, TX. Your sheets are picked, folded, and boxed by our own fulfillment team and handed to the carrier within 48 hours — free shipping over $75, and most of the U.S. sees delivery in 2–4 business days. Returns come back to the same dock, which is exactly why we can afford to run a real 100-night trial.
Can I talk to a real person?
Yes — real people in Houston, not a call center. Message us through the contact page and the founders or our fulfillment manager reply within one business day. The 48-hour dispatch window also exists so you have time to change or cancel an order before it ships.