This is the one for people who've never understood the appeal of a firm mattress.
The SK-2603 is rated around 3 to 3.5 out of 10 — genuinely ultra-soft. The surface gives deeply and slowly, so you settle into it rather than lying on top of it. If you're a side sleeper, or you've always found standard mattresses feel like they're pushing back at your hip and shoulder, this is what you've been looking for.
It gets that softness from depth, not weakness. There's 11 cm of comfort above the springs, including 6 cm of dense #30 high-resilience foam beneath the memory foam — so you sink in and then stop, rather than bottoming out against the coils.
1 · 2.5 cm of Gel Memory Foam
A full centimetre thicker than our standard soft model, and it's what makes this bed ultra-soft rather than just soft. More memory foam means more contouring at the shoulder and hip — the two places side sleepers feel pressure. Gel is infused throughout to help carry heat away from the surface, which matters more when there's this much foam involved.
2 · A 550 gsm Jacquard Knit Cover
Most mattress covers use fabric in the 300–400 gsm range. This one is 550 gsm — noticeably heavier, with a richer hand and a drape that looks finished rather than stretched. Practically, it means the quilting holds its shape longer and the surface stands up to years of sheet changes. It's the kind of detail you notice the moment you touch it.
Quilted with comfort foam and 2500# fibre wadding into a single panel, so the surface stays flat and even instead of bunching or drifting.
3 · 2.0 mm 8-Turn Pocketed Coils with a 7 cm Foam-Encased Edge
Each spring is wound with 8 turns rather than the usual 5–6 and sits in its own fabric pocket, so it moves independently. More turns means finer, more responsive adjustment — the mattress responds to light pressure at the shoulders as readily as to heavier pressure at the hips.
Around the perimeter sits a 7 cm-wide #35 high-density foam encasement — a solid foam rail, not just heavier springs. On an ultra-soft bed this matters more than anywhere else, because more of the surface is compressed. Sitting on the edge feels solid, and the full width stays usable.
Total profile: 33 cm — our tallest mattress.
Side sleepers · lighter body weights · anyone who finds even a "soft" mattress still feels firm · guest rooms where you want people to sleep unusually well.
Who should look elsewhere: back and stomach sleepers, and anyone over about 200 lb (90 kg) — an ultra-soft surface lets the pelvis drop, which is what makes a lower back ache. Our medium-soft and firm models will serve you better.
Single-sided — never flip it, just rotate 180° every 3–6 months. Arrives compressed and roll-packed in one reinforced carton: sleepable within hours, full height in 24–72 hours. A faint new-mattress smell for a day or two is normal; ventilate and it clears.
At 33 cm this is a tall mattress — deep-pocket or "extra deep" fitted sheets are recommended. Standard sheets may not tuck fully under the corners.
Because the comfort layer is this deep, give it two to three weeks to settle. It will feel slightly softer as the foams break in.
How soft is ultra soft? Around 3–3.5 out of 10 — our softest model. The surface gives deeply and slowly. Softer than our "soft" SK-2602.
Will I sink in too much? The 6 cm #30 high-resilience layer is specifically there to prevent that. You get a deep, plush surface without bottoming out against the springs.
How is this different from the SK-2602? Three upgrades: 2.5 cm of gel memory foam instead of 1.5 cm, a 550 gsm cover instead of 350 gsm, and a 33 cm profile instead of 31 cm. The result is a noticeably softer bed.
Is 33 cm too thick for my sheets? It's about 13 inches, so deep-pocket or "extra deep" fitted sheets are recommended.
How long until it's ready? Sleepable within hours; full height in 24–72 hours.
Choose your size and add to cart — our softest bed, delivered in one box.
