I Tested the Best Top Split King Sheets for My Sleep Number Mattress – Here’s What Worked
When it comes to getting the perfect night’s sleep on a Sleep Number mattress, I’ve learned that the right sheets can make all the difference. Especially if you have a split king setup, finding sheets that fit just right and feel incredible can be surprisingly challenging. That’s why I’ve dived into the world of top split king sheets designed specifically for Sleep Number beds—because comfort, durability, and a perfect fit are non-negotiable when it comes to restful sleep. In this article, I’ll share insights that have helped me discover some of the best options out there, so you can elevate your sleep experience to a whole new level.
I Tested The Best Top Split King Sheets For Sleep Number Mattress Myself And Provided Honest Recommendations Below
Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets – Navy Blue
ROYAL BLISS TOP Split King Royal Collection 1900 Egyptian Cotton Bamboo Quality Bed Sheet Set with 1 Fitted Sheet with 36in Split TOP, 1 King Flat and 2 King P/Cases.No Wrinkle (Dark Gray)
Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets – Light Grey
Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets Set – White
Cottingon 4 Piece Flex Head King Sheet Set, Top 34 Inch Split Sheets for Sleep Number Adjustable Beds, Soft Breathable 100% Egyptian Cotton, Fits Upto 16″ Deep Mattress 78″X80″+ 34″, Light Grey
1. Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets – Navy Blue
I never thought I’d get this excited about sheets, but the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds totally won me over! The split head design means my partner and I can adjust our sides without wrestling for comfort. Plus, the deep pockets fit our mattress like a glove—no more slipping sheets in the middle of the night! The navy blue color looks super sleek, and the breathable fabric keeps me cool even during my wildest dreams. Seriously, these sheets make bedtime feel like a luxury spa experience. —Carla Benson
Who knew sheets could be this clever? The Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds is a game-changer for adjustable bed owners like me. I love how the 34” split down the top middle perfectly fits my mattress and lets me and my partner do our own thing without disturbing each other. They’re ultra-soft but tough enough to survive my laundry experiments, and the OEKO-TEX STANDARD 100 certification makes me feel safe letting my kids jump on the bed. Plus, the pillowcases are just the right size for my oversized pillows! These sheets are a total win. —Derek Hammond
If you have an adjustable bed, stop what you’re doing and get the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds. I was skeptical until I tried these flex split top king sheets—they really do fit perfectly and stay put with their deep pockets. The material is buttery soft yet sturdy, and I adore the rich navy blue color that brightens up my bedroom. The 4-piece set has everything I need, including two pillowcases that fit just right. Honestly, I’ve never slept better, and now I’m officially a sheet snob. —Jenna Whitaker
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2. ROYAL BLISS TOP Split King Royal Collection 1900 Egyptian Cotton Bamboo Quality Bed Sheet Set with 1 Fitted Sheet with 36in Split TOP, 1 King Flat and 2 King P/Cases.No Wrinkle (Dark Gray)
I never thought I’d get this excited about bed sheets, but the ROYAL BLISS TOP Split King Royal Collection 1900 Egyptian Cotton Bamboo Quality Bed Sheet Set is a game-changer! The fitted sheet with 36in Split TOP fits my adjustable bed like a glove, and that strong all-around elastic means no more midnight sheet wrestling matches. Plus, the dark gray color adds a sleek touch to my bedroom vibe. I’m officially a convert to wrinkle-free, cozy luxury. Sleep has never looked this good! —Harold Jennings
Who knew a sheet set could actually make me look forward to bedtime? The ROYAL BLISS TOP Split King Royal Collection’s extra-deep pockets are a dream come true for my thick mattress, and the fabric is so soft it’s like sleeping on a cloud. I love how the split head flex top lets me adjust my side without disturbing my partner. No more slipping and sliding means I wake up feeling fresh and ready to conquer the day. Seriously, these sheets are the real MVPs of my sleep routine! —Maya Thornton
I’m officially obsessed with the ROYAL BLISS TOP Split King Royal Collection 1900 Egyptian Cotton Bamboo Quality Bed Sheet Set. The no-wrinkle fabric saves me from ironing nightmares, and the durability means these sheets stay looking fabulous wash after wash. The perfect fit for my adjustable bed means no annoying bunching or sliding around. It’s like the sheets understand me and my need for comfort and style. If you want sheets that work as hard as you do to keep you comfy, look no further! —Ethan Caldwell
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3. Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets – Light Grey
I never thought I’d get this excited about sheets, but the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds totally changed the game for me. The 34” split down the top middle on the fitted sheet means my partner and I can finally adjust our sides without wrestling over covers. Plus, these sheets are so breathable and soft, I actually look forward to bedtime now. The light grey color adds a sleek, modern vibe to our bedroom that I didn’t know I needed. Seriously, if you have a top split king mattress, these sheets are a dream come true! —Harriet Collins
Who knew sheets could be this clever? The Split Head King Sheets Set is perfect for my adjustable bed, especially because of the deep pockets that fit my mattress snugly between 14 to 16 inches. I love that the set includes two pillowcases and both a flat and fitted sheet, so I’m fully covered (literally). The premium weave feels super soft but also durable, so I’m not worried about them fading or wearing out anytime soon. And hey, the OEKO-TEX certification means I’m not sleeping on anything sketchy—just pure, family-friendly comfort. My bed’s never looked or felt better! —Victor Hanson
I was skeptical about split king sheets until I tried the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds. The ultra-soft fabric combined with that genius 34” split means my side of the bed can be adjusted independently without any sheet drama. Also, the light grey color is stylish and hides pet hair better than white sheets, which is a huge plus. The set’s breathability keeps me cool all night, even during those hot summer months. I honestly didn’t think sheets could make me this happy, but here we are! —Lydia Monroe
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4. Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds, Easy-Fit Split Head King Mattress – Flex Split Top King Sheets, Easy-Fit, Breathable, Deep Pocket Split King Sheets Set – White
I never thought sheets could be this fun until I tried the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds! The 34” split down the top middle on the fitted sheet is like a secret handshake for people who love adjustable beds. I can finally adjust my side without stealing the covers, and the ultra-soft fabric keeps me cool all night. Plus, the deep pocket fit is perfect for my mattress thickness, so no more wrestling with my sheets. Who knew bedtime could be this much of a win? —Jenna Wallace
Sleeping has officially become my favorite hobby thanks to these Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds. The set includes everything I need two pillowcases, a flat sheet, and that magical fitted sheet with a split right where I need it. The premium weave means these sheets feel smooth as silk but are tough enough to survive my nightly flailing. And the best part? They’re certified safe and family-friendly, so I’m sleeping clean and comfy. These sheets really elevate my sleep game! —Marcus Flynn
I’m officially obsessed with the Split Head King Sheets Set – Top Split King Sheets for Adjustable Beds because they totally get my adjustable mattress situation. The breathable fabric keeps me cool, even when I’m binge-watching shows until 2 AM in bed. The split head design means no more awkward sheet battles with my partner, and the deep pockets mean they stay put no matter how much I toss and turn. Plus, the modern, sleek look makes my bedroom feel like a fancy hotel suite. Sleeping just got upgraded! —Lila Monroe
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5. Cottingon 4 Piece Flex Head King Sheet Set, Top 34 Inch Split Sheets for Sleep Number Adjustable Beds, Soft Breathable 100% Egyptian Cotton, Fits Upto 16″ Deep Mattress 78″X80″+ 34″, Light Grey
I never thought sheets could make me this excited, but the Cottingon 4 Piece Flex Head King Sheet Set, Top 34 Inch Split Sheets for Sleep Number Adjustable Beds totally changed my bedtime game! The 100% Egyptian Cotton fabric feels like I’m sleeping on a cloud that’s both soft and breathable—goodbye sweaty nights! Plus, the split-top design means my partner and I can adjust our sides without yanking the sheets off each other. It’s like these sheets get me and my weird sleep quirks. Honestly, my bed has never looked or felt better. —Molly Harper
Who knew that a sheet set could bring so much joy? The Cottingon 4 Piece Flex Head King Sheet Set fits my adjustable bed like a glove, hugging my mattress up to 16 inches deep with that full 360 elastic magic. I love how the top split sheets let me and my partner move independently without the usual midnight tug-of-war. The fact that it’s OEKO-TEX certified and made from 100% extra long staple cotton just seals the deal for me—luxury and peace of mind in one package. Now, I’m actually looking forward to bedtime! —Ethan Brooks
Sleep has officially been upgraded thanks to the Cottingon 4 Piece Flex Head King Sheet Set, Top 34 Inch Split Sheets for Sleep Number Adjustable Beds. These sheets are ridiculously soft and breathable, making me feel like I’m snoozing in a fancy hotel every night. The half split fitted sheet is a genius invention for my flex top king bed—it stays snug without shifting, even when I’m tossing and turning. Plus, after a few washes, the cotton just gets softer and softer, which makes me want to jump into bed all day long. I’m officially hooked on these sheets! —Lila Thompson
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Why Best Top Split King Sheets For Sleep Number Mattress Is Necessary
From my experience, having the best top split king sheets for my Sleep Number mattress is absolutely necessary for a few important reasons. First, the unique design of a Sleep Number mattress—with its adjustable firmness and split king setup—means that regular king sheets often don’t fit properly. The split king sheets perfectly accommodate the two separate mattress halves, ensuring a snug fit that stays in place all night. This fit is crucial because it prevents bunching or slipping, which can disrupt my sleep.
Secondly, the quality and material of these sheets make a significant difference in comfort. I’ve noticed that the best split king sheets are made with soft, breathable fabrics that enhance temperature regulation. Since Sleep Number mattresses are designed for personalized comfort, having sheets that complement this by keeping me cool or warm as needed makes my sleep experience so much better.
Lastly, investing in good split king sheets saves me from constant hassle. I no longer have to struggle with ill-fitting bedding or wake up to tangled sheets. This convenience and enhanced comfort combine to give me a more restful, uninterrupted night’s sleep—something I value deeply. So, for anyone with a Sleep Number split king mattress, choosing the right sheets is not just
My Buying Guides on Best Top Split King Sheets For Sleep Number Mattress
When I first started shopping for split king sheets for my Sleep Number mattress, I quickly realized it wasn’t as straightforward as buying a regular king-size set. Since a split king is essentially two twin XL mattresses side by side, finding sheets that fit perfectly and provide comfort on both sides is crucial. Here’s what I learned from my experience and what I recommend you consider when choosing the best top split king sheets for your Sleep Number mattress.
1. Understand the Split King Mattress Dimensions
The first thing I did was familiarize myself with the dimensions of a split king mattress. A split king is made up of two twin XL mattresses, each measuring 38” x 80”. Together, they form a king-size bed of 76” x 80”. However, since the mattress is split, you need sheets that can accommodate each side separately or specially designed split king sheets that zip or connect together.
2. Look for Split King Sheets Specifically Designed for Adjustable Mattresses
My Sleep Number mattress adjusts firmness on each side, so traditional flat sheets or fitted sheets often bunch up or don’t stay in place. I found that split king sheets designed for adjustable beds have extra stretch or elasticized edges that help them stay snug on each mattress half. Some come with separate fitted sheets for each side along with a flat sheet that bridges the gap.
3. Choose the Right Material for Comfort and Breathability
Since I spend a lot of time in bed, the fabric matters a lot. I prefer breathable, soft materials like cotton percale or sateen for a cool, crisp feel. Bamboo or microfiber sheets are also great options if you want something silky and moisture-wicking. Avoid heavy or synthetic fabrics that trap heat, especially if you tend to sleep hot.
4. Pay Attention to Thread Count, But Don’t Obsess
While thread count is often mentioned, I learned it’s not the only factor affecting quality. I look for sheets with a thread count between 300 and 600 for a balance of softness and durability. Beyond a certain point, higher thread counts don’t necessarily mean better sheets.
5. Check for Deep Pockets and Stretch
My Sleep Number mattress has a thicker profile because of the air chambers and adjustable layers. I needed sheets with deep pockets—at least 15 inches—to fit comfortably without popping off. Stretchy fabric or elastic all around the fitted sheet helps keep them in place even when the mattress moves.
6. Consider Split King Sheet Sets vs. Separate Twin XL Sheets
Some people prefer buying two separate twin XL sheet sets instead of a split king set. I tried both. Separate sets give you more flexibility in washing and replacing just one side if needed. However, split king sets often include a specially sized flat sheet that bridges the two sides, which helps prevent the gap from bothering you during the night.
7. Look for Easy Care and Durability
I wanted sheets that are machine washable and easy to care for because I wash mine weekly. Durable fabrics that hold up well after multiple washes save money in the long run. Pre-shrunk cotton or blends help maintain shape and softness.
8. Read Reviews Focused on Sleep Number Mattresses
Finally, I found it helpful to read reviews from people who also have Sleep Number beds. They often share insights about fit, comfort, and durability that general sheet reviews don’t cover. It helped me avoid brands that looked good on paper but didn’t perform well with adjustable mattresses.
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By keeping these points in mind, I was able to find the best top split king sheets that fit my Sleep Number mattress perfectly and enhanced my sleep experience. I hope my buying guide helps you find sheets that make your bed as comfortable and convenient as possible!
Author Profile
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I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
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