What sheets are needed for a split king adjustable bed?
You only need a single sheet to cover your regular king-size mattress. However, a split king is comprised of two Twin XL mattresses, and that’s why you need two Twin XL sheets for your split king.
Can I use regular sheets on a sleep Number bed?
No problem, each side is fully adjustable to your preferences. While they do sell sheets at the store you can use your regular sheets on this bed. Since you are spending a decent amount of money on a mattress it is nice to know you can save by using sheets you already own.

Is it difficult to put sheets on a split king bed?
I actually think making a split king is easier than a regular king. If you raise the head adjustment all the way up, the corners of the mattress are almost at eye level, making it even easier to place the sheets on.
How do you put bedding on a split king adjustable bed?
To put sheets on a split king bed, you simply put one twin XL fitted sheets on each mattress, and then put your flat sheet and comforter on like you would with a regular king-sized bed.
What size sheets fit a split Cal King?

39 x 84 inches
Split king beds are created from two twin XL mattresses. Thus, a Split King is equipped with two twin XL fitted sheets that have a measurement of 39 x 84 inches.
Should you use a pillow with an adjustable bed?
Sleeping on your back in an Adjustable Bed This helps to temporarily relieve pain, and ultimately, you will be provided with a relaxing nights rest! Often pillows can be used as a method of pain relief and spinal support. Although this is an ideal quick fix, these pillows can move around as you do when you are asleep.
Can I use a bedskirt with an adjustable bed?
As you may have guessed already from the above description of how a bed skirt works, the short answer is no. Since the platform of the adjustable base can be raised, a regular dust ruffle that goes directly over the platform will get stretched every time you modify the angle of the head or the foot of the platform.
Do Sleep Number beds need special sheets?
What size sheets fit a split king?
In summary, the size of split king sheets is the same as Twin XL sheets, 38” wide and 80” long. A package of split king sheets should come with two sheets to cover each side.