My Mattress Has Dips or Impressions

Applies to all Sleep Number mattresses.

Quick answer

A small body impression can be normal, especially at a lower Sleep Number setting. If your mattress looks uneven only after sleeping on it, that does not always mean something is wrong.

A dip may need attention if:

• the bed still looks sunken with no one in it
• both sides are set to 100
• one side feels less supportive than the other
• the bed feels flat, soft, or uneven every day

Important: If your bed is losing air, not inflating, or changing firmness overnight, that is usually not the same as a normal body impression. Start with the steps below, but if the bed will not stay inflated, you may need help with a different issue.

Start here

Step 1: Remove all bedding

Take off sheets, blankets, mattress pads, toppers, and anything else on the bed.

Step 2: Set both sides to 100

With no one in the bed, inflate both sides to 100.

Step 3: Look at the mattress

Use this quick guide:

What is normal

• a light impression where you usually sleep
• a softer feel at lower Sleep Number settings
• a dip that improves when the bed is set higher

What is not normal

• the mattress still looks sunken at 100
• one side feels much flatter than the other
• the center or one side has poor support even when fully inflated
• the bed feels flat because it is not holding air

Choose the symptom that best matches what you see

If the bed feels flat, loses firmness, or will not stay inflated

This may be an air or inflation issue, not just a mattress impression. Proceed to My Sleep Number Bed is Losing Air for issue identification.

If the mattress still looks sunken at 100 with no one in bed

Follow the steps below for your bed type.

• FlexFit® adjustable smart base
• Integrated base with stylish frame
• Integrated base (no legs) or on a non-Sleep Number base
• Traditional Sleep Number mattress (mattresses purchased prior to 2017)

Find your bed type

Sleep Number smart bed on a FlexFit® adjustable smart base

If your base adjusts at the head and/or foot, start here.

1. Remove all bedding.
2. Check the base legs.
3. Make sure the pin on each adjustable leg is set to the same hole.
4. Make sure each leg has a black rubber cap.
5. Set the bed to 100 on both sides with no one in bed.
6. Visually inspect the mattress.

If the mattress still looks sunken at 100, contact Customer Service for help next steps.

Sleep Number smart bed on an integrated base with stylish frame

1. Remove all bedding.
2. Make sure the integrated base is aligned and sits flush with the stylish frame.
3. Inspect the floor and make sure the bed is level.
4. Set both sides to 100 with no one in the bed.
5. Visually inspect the mattress.

If the mattress still looks sunken at 100, contact Customer Service for help next steps.

Sleep Number smart bed on an integrated base (no legs) or on a non-Sleep Number base

1. Remove all bedding.
2. Inspect the furniture or frame the mattress sits on.
3. Make sure:
   • the floor is level
   • the bed has proper center support
   • the frame or furniture is not damaged
4. Set both sides to 100 with no one in bed.
5. Visually inspect the mattress.

If the mattress still looks sunken at 100, contact Customer Service for help next steps.

Traditional Sleep Number mattress

1. Remove all bedding.
2. Find the zipper at the head of the bed.
3. Unzip and remove the top cover panel.
4. Inspect the foam comfort layer with your hands.
   • Compare the area where you sleep to the corner of the pad.
   • Check whether the foam feels softer, thinner, or less supportive.
5. If your mattress is a c2, note that it does not have a foam comfort layer.
6. Before closing the bed, hold the top cover panel on one side and shake it like a rug to help fluff it. Repeat on all four sides.
7. Zip the cover back on.

If you notice reduced support in the foam, contact Customer Service for help next steps.

What to do next

Contact us if:

• the mattress still looks sunken at 100
• the foam feels thinner, softer, or less supportive
• one side is much flatter than the other
• the issue comes back right away after testing

Try a different troubleshooting path if:

• the bed is not filling with air
• one side will not stay inflated
• the firmness drops during the night
• the bed changes shape only while it is in use

This distinction is important because many comments in the feedback were actually describing air loss, deflation, or firmness changes, not just foam impressions. Start with My Sleep Number® Bed Is Losing Air for troubleshooting.

FAQ

Is a body impression normal?

Yes. A small impression can be normal, especially at lower Sleep Number settings. Both current articles explain that visible body impressions can happen because the bed is adjustable and responds to your comfort setting.

When should I be concerned?

Be concerned if the mattress still looks sunken when:

• both sides are at 100
• no one is in the bed
• the bed has proper support underneath

What if only one side is sinking?

Check the support under that side first. If you have a smart bed with an adjustable base, make sure all leg pins match and each leg has its rubber cap. If the issue remains at 100, contact support.

What if my bed is flat or not holding air?

That is often a different issue than a foam impression. Start with the checks in this article, but if the bed will not stay inflated, you may need help with an air or inflation-related issue.

What if I do not know which bed type I have?

Use the setup under your bed as your guide:

• if the base adjusts, choose FlexFit adjustable smart base
• if the base sits inside a frame, choose integrated base with stylish frame
• if the mattress sits on furniture or another base, choose non-Sleep Number base / furniture support
• if your article history refers to a traditional mattress rather than a smart bed, follow the traditional mattress steps

Helpful tips

• Check the bed without bedding first.
• Test the bed at 100 before deciding it is a foam issue.
• Make sure the frame, base, and floor are level.
• If the issue only happens while sleeping, do not assume it is just a mattress impression.