Egg Crate Convoluted Foam

This egg crate convoluted foam is a comfort layer for a Sleep Number® bed with a peak-and-valley surface that adds cushioning and airflow. For people who want both a little extra comfort and support, this HD36-R convoluted foam is a great middle-ground and an economical way to improve the feel of your bed without buying a new one. The convoluted peaks relieve pressure, and the open channels between them circulate air in a way that solid toppers cannot, so it sleeps cooler. Made in the USA.

What this foam feels like

This is a medium feel at 35 ILD — the same firmness as our medium regular foam — but with the convoluted egg crate surface, the peaks give a little extra cushion and the valleys add airflow. A nice feature of egg crate is that it offers two slightly different feels depending on which way you lay it: peaks up gives one feel, and flipping it the other way gives another, so you can try both and keep whichever you prefer.

Specifications

• Type: HD36-R convoluted (egg crate) foam
• Feel: medium, 35 ILD — two slightly different feels depending on which side faces up
• Surface: peak-and-valley design for cushioning and airflow
• Thickness options: 1.5" or 2.5"
• Made to order in the USA to fit your size

Compare our Sleep Number foams

All of our comfort foams are made to order in the sizes and heights shown on each product. Here is how the feels compare so you can pick the right one:

Sizes & measurements

Choose your size below and the thickness (1.5" or 2.5") that matches your bed. The foam lays over the air chambers inside the cover.

Will this fit my Sleep Number bed?

Because every layer is made to order, we fit older beds, newer smart-bed models, split setups, and sizes the manufacturer no longer sells — including Split Queen, Expanded Queen, and Split Cal King. Egg crate is often used as a light comfort layer on its own or stacked over another foam. If you want a different surface feel, compare our regular foams, plush gel memory foam, or natural latex. If the foam sides of your bed have also softened, you can refresh the perimeter with new foam side rails or the full complete rail set. Browse everything on our Sleep Number foam & rails page or the full Sleep Number repair parts collection.

Frequently asked questions

What is egg crate foam used for?

It is a convoluted comfort layer with a peak-and-valley surface that adds cushioning and airflow. It is an economical way to improve the feel of a Sleep Number bed without buying a new mattress, used on its own or stacked over another foam layer.

Does it really have two different feels?

Yes. Egg crate gives a slightly different feel depending on which side you lay facing up, so you can try it both ways and keep whichever feels best to you.

It only comes in 1.5" and 2.5" — which do I order?

Match it to your current foam: if yours measures close to 1", order the 1.5"; if it measures close to 2", order the 2.5". If your current foam is about 3", the 2.5" will fit and you can add a separate 1" foam layer now or later to fill the rest.

How firm is it?

It is a medium feel at 35 ILD, the same firmness as our medium regular foam, with the added cushioning and airflow of the convoluted surface.

Will it fit an older or discontinued size?

Yes. Because it is made to order, we can match older, split, and discontinued sizes, including Split Queen, Expanded Queen, and Split Cal King.

What if the foam is too firm or too soft?

No problem — we offer a 30-day comfort exchange. Return it for a full refund or credit, or keep it and take a one-time 50% off a replacement (most people choose this — nothing to ship back). See our Foam Comfort Exchange & Return Policy for full details.