Sleep in luxury with these sheets.

You can’t put a price on a good night’s sleep. As someone who has struggled with insomnia and comfortable beds for many years, I can say with some certainty that bedding definitely plays a role with how well you sleep at night. Scratchy sheets or ones that make you too warm at night can contribute to a restless night. Many years ago, I was introduced to premium quality sheets with a high thread count and I was shocked at the difference those sheets made in how I slept. Now, I share a Sleep Number bed with my fiance and we have opted to stick with Sleep Number brand sheet sets. We have a Split King mattress and that makes it hard to find sheets that fit correctly. Sleep Number offers a lot of different styles of sheets and we recently had the chance to try out the Lyocell Ultra Sheet Set. They are soft, breathable and provide comfort to users all night long. 


The Lyocell Ultra Sheet Sets feature a 300-thread-count sateen weave that provides luxurious softness. They will fit any mattress thickness up to 15 inches. Lyocell is a form of rayon and is used often for creating textiles. Sleep Number offers the sheet sets for Queen, Expanded Queen, King, Split King, FlexTop King, California King, Split California King, FlexTop California King, and Grand King. The sheets are designed and crafted in the USA even though they are made from imported materials. Like other Sleep Number sheets, the Lyocell Ultra Sheets feature the ExactFit sheet design and have the SmartFit design strap installed so that the fitted sheet remains secure on the mattress. The sheet set includes:

Sleep Number Lyocell Ultra Sheets
  • One oversized flat sheet
  • One fitted sheet (Split King and Split California King sets contain two Twin Long fitted sheets)
  • Two pillowcases

In addition to the size options, Sleep Number has also provided several color choices including – Ivory, Marine Blue, Cloud Gray, White, Stone, Soft Green, and Soft Lilac. 


The Lyocell Ultra Sheet Set comes in a standard canvas package that Sleep Number wraps their sheet sets in. The outside of the bag has the Sleep Number logo on it and a tag is attached that indicates which type of sheets are in the package. I sort of wish the name/type of the sheets was listed on the canvas bag as well because I think it would be easier for people to find the sheets they are looking for rather than having to flip through tiny retail tags. When you open the bag, you will find the sheets wrapped around a piece of cardboard. This helps the sheets have a shape for the canvas bag. Once you unwrap the contents you will find the flat sheet, fitted sheet, and two pillowcases. There is also a care card enclosed that outlines how to install the sheets on your bed and the best way to take care of them. 

Sleep Number Lyocell Ultra Sheets

Once I had all the pieces unpacked, I started laying out the fitted sheet on our bed. We have the Split Top King mattress so the installation is a little different than some other sizes. With the Split Top sheets, there is a cut in the fitted sheet that slips over the top of both halves of the bed. The top quarter of the mattress has a cut down the center so it’s almost like two twin mattresses. The fitted sheet loops around all four corners of the Split Top King mattress using the standard elastic band that Sleep Number includes on their sheets. We’ve had our mattress for about three years now and we’ve never had an issue with our sheets slipping off the corners like we did with standard mattresess. I believe this is due to that elastic strap on the fitted sheet. Once the fitted sheet was installed on the mattress, the rest of the set was placed easily. The pillowcases appear to be king-size pillowcases with this set because they are quite a bit longer than our standard pillows. This isn’t a deal-breaker for us because we can just fold the pillowcase under the pillow. 

Sleep Number Lyocell Ultra Sheets

We have found ourselves with a quite unseasonably warm start to our winter here in the midwest. Because of that, I’m grateful to have these smooth, cool sheets on our bed. Even though the sheets only have 300-thread count, they feel more like 800 or even 1000 thread count. They are so silky smooth that it’s really hard to imagine using any other style of sheets. The sheets feel a bit thicker than our last set (the Essential Fit Cotton Sheet Set) but they are by no means ‘heavy.’ We opted for the Ivory color in the Lyocell Sheets and they pair nicely with the True Temp Blanket. 

Sleep Number Lyocell Ultra Sheets


I may be biased, but I think the Lyocell Ultra Sheets are my favorite sheets to date. They are thick, but not heavy; They keep me warm, but I don’t feel smothered by them; and, they feel like they have a much higher thread count than they actually do. I’ve been sleeping really well with these on our bed and think they can’t be beat by standard sheets. 

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