Firmer feel by design
Japanese innovation behind the build
Two models only
Less choice. More expertise.
Less choice. More expertise.
A performance stack built for cooling response, pressure comfort, and firm stability.
A performance stack built for cooling response, pressure comfort, and firm stability.
Built to reduce heat build-up and the “sticky” feeling in humid nights.
Built to reduce heat build-up and the “sticky” feeling in humid nights.
A high-resistance feel that stays stable—less sink, steadier posture.
A high-resistance feel that stays stable—less sink, steadier posture.
Designed to reduce movement transfer—so one person can move without disturbing the other.
Designed to reduce movement transfer—so one person can move without disturbing the other.
A reinforced perimeter for steadier sitting and a more stable sleep surface.
A reinforced perimeter for steadier sitting and a more stable sleep surface.
What you get with every ShinJu mattress.
Vacuum-packed for freshness and germ-free delivery.
Setup your ShinJu mattress in 5 easy steps.
Your partner's tosses and turns can't disrupt your slumber.
The added carbon results in firmer tensile strength.
Follows the curves of your body for maximum comfort.
Natural latex is hypoallergenic, durable, and eco-friendly.
Pocketed Spring or Foam. Two builds, one standard of sleep.
Pocketed Spring or Foam. Two builds, one standard of sleep.
ShinJu is a mattress system designed by Picket & Rail for real-life sleep in Singapore— warm nights, air-con rooms, and people who want stable support without a sinky feel. Our build is guided by a Japanese sleep-lab research protocol from Inkagu Lab, so the engineering focuses on what you actually feel: cooling comfort, pressure relief, and consistent support.
Many mattresses feel good for five minutes, then turn soft and unstable through the night. ShinJu is intentionally supportive (medium-firm to firm feel) to help the body stay steadier—especially around the lower back and hips—while comfort layers reduce pressure points so it doesn’t feel harsh.
Prefer a softer surface feel? Add the topper option to soften the top comfort while keeping stable support underneath.
“Cooling” shouldn’t be a gimmick. ShinJu is built to reduce heat build-up by focusing on:
Both models share the same sleep-engineering intent—cooling comfort and stable support—but the core feel differs:
ShinJu Air (Pocketed Spring)
More responsive support, strong motion separation, and easier movement.
ShinJu X (Foam)
Quieter, steadier support with minimal bounce and a stable “one-piece” feel.
If you like a responsive feel and stronger motion separation, pick Air. If you want quiet, steady support with minimal bounce, pick X.
Is ShinJu firm?
ShinJu is supportive (medium-firm to firm feel) and designed to stay stable rather than sinky.
What if ShinJu feels too firm for me?
You can add the topper option to soften the surface feel while keeping stable support underneath.
What’s the difference between ShinJu Air and ShinJu X?
Air feels more responsive with pocketed spring support and stronger motion separation. X feels steadier and quieter with minimal bounce.
Which one is better for couples?
If motion transfer matters more, ShinJu Air is usually the better choice due to pocketed spring separation. If you prefer a quieter, steadier feel, ShinJu X is excellent too.
Do these mattresses sleep cool in Singapore?
They’re designed to reduce heat build-up with a cool-to-touch top feel and breathable construction. Your bedding choice also affects cooling.
Will it feel “sinky” like soft memory foam?
ShinJu is built to stay stable. X is steadier than deep-sink styles; Air feels more buoyant and responsive.
Is the edge stable for sitting?
ShinJu uses reinforced edge construction so the perimeter feels steadier and the usable sleep surface feels larger.
How do I choose if I’m unsure?
Choose Air for responsive support + motion separation. Choose X for quiet, steady support with minimal bounce.
ShinJu mattress is a true testament to thoughtful engineering and innovation in the world of sleep technology. By skillfully combining air gel foam, activated charcoal memory foam, and pocketed springs, Inkagu has crafted a mattress that transcends the ordinary and embraces the extraordinary. The mattress's unique blend of cooling properties, odor absorption, targeted support, and motion isolation creates an unparalleled sleep experience that caters to the diverse needs of individual sleepers. With Inkagu's hybrid mattress, customers can rest assured that they are investing in a product that goes beyond the sum of its parts, offering a superior and rejuvenating rest every night.
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Comfort is undoubtedly the most critical factor to consider when selecting a mattress. A comfortable mattress provides adequate support and cushioning for your body, helping to alleviate discomfort and promote a good night's sleep. When shopping for a new mattress, it is essential to take the time to test out various models to find the right level of comfort for your needs.
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