Flat Sheet vs. Fitted Sheet: What Each Layer Does and How to Use Both
TL;DR: A fitted sheet stays anchored to the mattress, while a flat sheet creates a smooth, comfortable layer above it. Pure Fiber’s four-piece bamboo viscose sheet set includes one of each, plus two pillowcases, so your bed has the essential layers covered.
Making a bed is easier when each sheet has a clear job. The fitted sheet hugs the mattress. The flat sheet lies over you or between you and a blanket. Together, they create a simple foundation for a comfortable, well-made bed.
Pure Fiber’s Bamboo Viscose Sheets Set includes both layers in 100% bamboo viscose, also described as rayon from bamboo viscose. The set is available in Queen, King, and California King sizes.
What is the difference between a flat sheet and a fitted sheet?
A fitted sheet has elasticated edges that help it stay in place around the mattress. A flat sheet is a rectangular piece of fabric without fitted corners. It is placed over the mattress and under a blanket, or used as the top layer between your body and the rest of the bedding.
The two sheets are designed to work together. The fitted sheet creates the anchored base. The flat sheet adds a lightweight, smooth layer that can be tucked at the foot and sides of the bed.
At a glance: flat sheet vs. fitted sheet
| Feature | Fitted sheet | Flat sheet |
|---|---|---|
| Main job | Covers and stays anchored to the mattress | Adds a smooth top layer above the mattress |
| Shape | Shaped with fitted corners and elasticated edges | Flat rectangle with no fitted corners |
| Placement | Directly on the mattress | Over the sleeper or between the sleeper and a blanket |
| Included in Pure Fiber’s four-piece set | Yes | Yes |
| Material in the set | 100% bamboo viscose, also called rayon from bamboo viscose | 100% bamboo viscose, also called rayon from bamboo viscose |
Why use a fitted sheet?
The fitted sheet is the foundation of the bed. Its elasticated edges help keep it in place while you move through the night. Pure Fiber’s sheet set lists a 17-inch pocket depth for the fitted sheet in Queen, King, and California King sizes.
Measure your mattress before ordering. A fitted sheet should cover the mattress securely without pulling free at the corners.
Why use a flat sheet?
A flat sheet gives you a separate top layer that is easy to straighten, wash, and change. It can be tucked neatly at the foot of the bed or left relaxed for a softer, more casual look.
In Pure Fiber’s set, the flat sheet is made from the same 100% bamboo viscose fabric as the fitted sheet. The fabric is lightweight, breathable, thermoregulating, and moisture-wicking according to the product listing.
Do you need both sheets?
You can make a bed with only a fitted sheet, but using both gives you more flexibility. The fitted sheet protects the mattress surface and stays anchored. The flat sheet adds another washable layer and can reduce the need to wash a heavier blanket as often.
If you prefer a simpler routine, start with the fitted sheet. If you like a traditional layered bed, use both pieces together.
How do you put both sheets on the bed?
Start with the fitted sheet. Place each corner over the corresponding mattress corner, then check that the elasticated edges sit evenly underneath the mattress.
Next, spread the flat sheet across the bed. Place the finished side facing up if you want the top edge to fold over a blanket. Tuck the foot of the sheet under the mattress and make a clean fold at each lower corner. Leave the top edge relaxed or fold it back for a more finished look.
What comes in Pure Fiber’s four-piece sheet set?
The set includes one fitted sheet, one flat sheet, and two pillowcases. It is available in Queen, King, and California King sizes, with six listed colors: White, Grey, Light Blue, Blush Pink, Denim Blue, and Soft Green.
The sheet set uses a 250 thread count twill weave. Care instructions are simple: machine wash cold and tumble dry low.
Frequently asked questions
Is a flat sheet the same as a fitted sheet?
No. A fitted sheet has elasticated edges and fitted corners to stay on the mattress. A flat sheet is rectangular and does not have fitted corners.
Which sheet goes on the mattress first?
The fitted sheet goes directly on the mattress. The flat sheet goes on top of it.
Does the Pure Fiber sheet set include both types of sheets?
Yes. The four-piece set includes one fitted sheet, one flat sheet, and two pillowcases.
What is the fitted sheet pocket depth?
The product listing specifies a 17-inch pocket depth for the Queen, King, and California King fitted sheets.
What are the sheets made from?
The set is made from 100% bamboo viscose, also described as rayon from bamboo viscose.
How should you wash the sheets?
Machine wash cold and tumble dry low, following the product care instructions.
Where can I shop the set?
Shop the Bamboo Viscose Sheets Set, or browse the full Bedding collection.
Build a bed that works for you
There is no single right way to make a bed. Start with the fitted sheet for an anchored base, then add the flat sheet when you want another lightweight layer and a more traditional finish.
Shop the Pure Fiber Bedding collection to create a setup that fits your routine.
