Sleep Better with Slecofom

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Up to 25% Off Sitewide

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101-night trial

Free shipping & returns

Lost package compensation

Safe material certification

10-year mattress warranty

Five-star after-sales service

5,863 Reviews

Balanced Comfort

Not too soft, not too firm,The perfect balance for every sleeper.

Comfort

Support

Cooling

Yuktanand Singh MD. ✓ Verified Customer

"All the expensive mattresses that we have purchased so far have started to sag after some time. This one shows no sagging after 4 months. Even the edges hold their shape. It is comfortable and my wife loves it."

Quality Sleep Sleeps Cool Body Contouring

8,668 Reviews

Enhanced Support

Maximum support, zero compromise，Strong support, minimal sink.

Comfort

Support

Cooling

Joey Hay. ✓ Verified Customer

"This bed has been incredible! Firm with just enough cushion on top that doesn’t cause you to sink in. This is an amazing bed if you’re looking for firm. !"

Extra Firm Back Pain Relief Firm Support

3,869 Reviews

Luxury Monarch Feel

Soft, cloud-like top layer with a supportive base，Soft on top, supportive underneath.

Comfort

Support

Cooling

Elena. ✓ Verified Customer

"It is firm and comfortable. Is is firmer in one side and a bit softer on the other side. It is double sided, and we flipping the mattress once a week."

Monarch Royal Zero Motion Transfer Cool Sleep Surface

At the heart of every product lies a unique story, driven by our passion for quality and innovation.

Each item enhances your everyday life and sparks joy.

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Foam Encased Edge

Sponge reinforced edge technology Makes you feel more at ease getting in and out of bed and sitting beside the bed.

Extra Firm Feel

Reinforced 2.2 wire diameter high strength independent spring Silent technology, motion isolation, flipping will not wake your loved ones.

Stay Cool All Night

Breathable Comfort That Lets Air Flow Freely for a Fresh, Restful Sleep.

Do you want to know the real feeling of using a mattress?

Our mattresses are sold all over the world, with sales of up to 1 million units per year, providing better quality mattresses and services to people around the world, and at the same time, we have received 12,000 five-star reviews and user experience.

Want to see their real experience using it? click button

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Free Shipping in 2 - 4 Days

Lifetime Warranty

Assembled in USA

How long does shipping take?

1.After placing your order, it will be shipped via UPS or FedEx, with an estimated delivery time of 2-4 days. You will receive a tracking number once your order ships.

2.We vacuum-sealed our memory foam mattresses into the packaging box for shipping. Please allow 48-72 hours for the mattress to inflate completely.

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America's Best Online

Extra Firm Side Support Mattress In A Box!

1. Foam Encased Technology

Four sides are wrapped with high density firm foam.

2. Extra Firm Side Support

Reduce the edge collapse problem of Mattress In A Box

3. Comfortable Plus Euro Top

The luxurious combination of materials and design styles

4. Fiberglass-Free Material

All series Slecofom mattresses do not contain fiberglass

Shop Now! Starts from $599!

Frequently Asked Questions

Got questions? We've got answers.

Is this mattress truly firm or just medium-firm?

This is a true extra-firm mattress, not a soft or medium feel. It’s specifically designed for people who need strong support and minimal sinking, thanks to its reinforced pocket coil system and high-density support layers.

Will the edges sink when I sit or sleep near the edge?

No. This mattress features high-density foam encased edge support, which keeps the edges stable and supportive. You can sit, sleep, or get in and out of bed without feeling like you’ll slide off.

Is this good for heavier people?

Yes. The reinforced heavy-duty pocket coils provide strong support and durability, making it a great choice for heavier sleepers or anyone who needs extra support without sagging.

Does this mattress sag over time?

It’s designed to resist sagging. The combination of individually wrapped coils + high-density foam layers helps maintain shape and support over time.

Is this mattress too firm for side sleepers?

This mattress is on the firmer side, which is ideal for back and stomach sleepers. Side sleepers who prefer a softer feel may consider adding a mattress topper for extra cushioning.

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