Yusim Mattress Co.
The Core Mattress
The Core Mattress
Couldn't load pickup availability
The Core is built on a simple idea.
The Core gives you firm on one side, medium on the other — so whichever you choose, you have the option to flip. Your preference changes over time. Your mattress should be able to change with you.
Built by David Yusim, a 25-year mattress industry veteran, The Core is a hybrid mattress combining individually wrapped pocket coils with premium foam layers. Constructed with real attention to what's inside, not just what it looks like.
One mattress. Done right.
The Details
Construction: Hybrid — individually wrapped pocket coils + premium foam layers
Comfort: Dual-sided — Firm / Medium
Available sizes: Twin, Full, Queen, King
Optional add-on: Foundation available — select at checkout
Made to order — every mattress is built fresh for your delivery
Warranty: 2-year full warranty against sagging or defects
Limited warranty: 10-year limited warranty
Local delivery: New York & New Jersey only
Lead time: 1-2 weeks from order to delivery
What's Inside: Layer Breakdown
Nothing Hidden. Everything Intentional.
11 layers. Identical on both sides.
Organic Cover
Soft, breathable, durable on both sides.
Memory Foam
Conforms to your body for pressure relief.
Exel Layer 2.2 Foam
Responsive transition layer between comfort and support.
High Density 1.8 Foam
Foundational support layer.
Separation Pad
Isolates the coil system for clean performance on both sides.
Pocket Coil 789 with Firmer Edge Coils
Individually wrapped coils for motion isolation and support. Reinforced edges so you never feel like you're rolling off.
Then it mirrors back — same layers in reverse on the other side.
The firm side and medium side are built into the coil and foam configuration. This is real dual-sided construction.
Why the Core
-
Two Mattresses in One
Firm on one side. Medium on the other. Flip whenever your needs change — no guessing, no regrets.
-
Made to Order
Every Core is built fresh after you place your order. No warehouse. No sitting on a shelf. Yours is made for you.
-
Local Delivery, NY & NJ
We coordinate delivery directly with you throughout New York and New Jersey. Personal, scheduled, and handled with care.
About the Maker
David Yusim has spent 25 years inside the mattress industry — not selling mattresses, but building them. He knows the machines, the materials, and exactly what separates a mattress that lasts 15 years from one that gives out in five.
His family has been manufacturing mattresses since 1928. The Core is the result of nearly a century of knowledge, built without compromise.
Every mattress we sell has his name on it. That means something to him.
Backed by a 2-year full warranty and 10-year limited warranty, because we stand behind what we build.