---
product_id: 766719279
title: "Helix Midnight Mattress, California King"
brand: "helix"
price: "¥589066"
currency: JPY
in_stock: true
category: "Helix"
url: https://www.desertcart.jp/products/766719279-helix-midnight-mattress-california-king
store_origin: JP
region: Japan
---

# Hundreds of pocketed steel coils Breathable Breathe Knit cover 3-layer personalized foam support Helix Midnight Mattress, California King

**Brand:** helix
**Price:** ¥589066
**Availability:** ✅ In Stock

## Summary

> 🌙 Sleep smarter, not harder — the Midnight mattress that’s made for your best night yet!

## Quick Answers

- **What is this?** Helix Midnight Mattress, California King by helix
- **How much does it cost?** ¥589066 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/766719279-helix-midnight-mattress-california-king)

## Best For

- helix enthusiasts

## Why This Product

- Trusted helix brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly & Risk-Free:** Fiberglass-free, GREENGUARD Gold & CertiPUR-US certified foams, plus a 120-night trial and lifetime warranty for peace of mind.
- • **SupremeSupport Memory Foam:** Exclusive 2.5x more cushioning memory foam ensures deep relaxation and superior recharge every night.
- • **Cool & Breathable Sleep Surface:** Breathe Knit pillow top cover promotes airflow, keeping you cool and comfortable all night long.
- • **Motion Isolation with Steel Coils:** Individually wrapped pocketed coils and reinforced edges minimize motion transfer for undisturbed rest.
- • **Tailored Comfort for Side Sleepers:** 3 select foam layers deliver targeted pressure relief and ergonomic support designed specifically for side sleepers and restless tossers.

## Overview

The Helix Midnight California King mattress combines a hybrid design with 3 layers of premium memory foam and hundreds of pocketed steel coils to provide medium-firm, personalized support ideal for side sleepers. Featuring a breathable Breathe Knit cover and reinforced edges, it offers excellent airflow and motion isolation. Certified for safety and eco-friendliness, it ships compressed for easy setup and includes a 120-night trial plus lifetime warranty.

## Description

Buy Helix Midnight Mattress, California King: Mattresses - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- PERSONALIZED SUPPORT: 3 select foam layers provide tailored pressure relief and targeted ergonomic support to make this the perfect option for SIDE SLEEPERS and toss and turners. Exclusive SupremeSupport 2.5 Memory Foam with 2.5x more cushioning than other mattresses to help you relax and recharge.
- BREATHABLE COMFORT: Breathe Knit cover pillow top for excellent airflow. Hundreds of individually wrapped steel coils and reinforced side perimeters to cradle sleepers and limit motion transfer.
- MEDIUM FEEL(Midnight): Premium pressure relieving foams contour to your hips and shoulders for a balanced feel; 6 out of 10 on firmness scale with 10 being the firmest.
- EASY SET UP: Compressed and rolled for easy and convenient parcel shipping and set up.
- ONLY THE BEST MATERIALS: This bed in a box mattress is Fiberglass-free, GREENGUARD Gold certified, and made with CertiPUR-US certified foams. Each mattress is carefully assembled in our own Arizona facility and delivered right to your door. We want you to be happy with your mattress and that's why we offer a 120 night sleep trial and a Limited Lifetime Warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D3WMJLG8 |
| Additional Features | Mattress in a box |
| Age Range Description | Unisex Adult |
| Best Sellers Rank | #283,034 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #641 in Mattresses |
| Brand Name | Helix |
| Color | White and Brown |
| Construction Type | Hybrid |
| Cover Material | Polyester Blend |
| Customer Reviews | 4.5 4.5 out of 5 stars (14) |
| Fill Material | Memory Foam |
| Item Depth | 11.5 inches |
| Item Dimensions | 84 x 72 x 11.5 inches |
| Item Dimensions L x W x Thickness | 84"L x 72"W x 11.5"Th |
| Item Firmness Description | Medium |
| Item Weight | 140 pounds |
| Material Type | Steel Coils, Foam |
| Mattress Coil Type | Pocketed Coil |
| Mattress Comfort Layer Material | Comfort Foam |
| Model Name | Midnight |
| Model Number | 2284bb88-9043-442c-ac20-a43c2dfd0541 |
| Number of Layers | 3 |
| Number of Mattress Coils | 100 |
| Product Benefits | Improves Sleep |
| Product Care Instructions | Hand Wash Only |
| Set Name | Midnight |
| Size | California King |
| Style Name | Medium - Midnight Core |
| UPC | 810042450110 |
| top-style | Plush Top |

## Product Details

- **Brand:** Helix
- **Cover Material:** Polyester Blend
- **Fill Material:** Memory Foam
- **Item Firmness Description:** Medium
- **Item Weight:** 140 pounds
- **Number of Layers:** 3
- **Product Dimensions:** 84"L x 72"W x 11.5"Th
- **Size:** California King
- **Special Feature:** Mattress in a box
- **Top Style:** Plush Top

## Images

![Helix Midnight Mattress, California King - Image 1](https://m.media-amazon.com/images/I/71UOcKL19HL.jpg)
![Helix Midnight Mattress, California King - Image 2](https://m.media-amazon.com/images/I/71Ns1wvZnlL.jpg)
![Helix Midnight Mattress, California King - Image 3](https://m.media-amazon.com/images/I/71u4OY-844L.jpg)
![Helix Midnight Mattress, California King - Image 4](https://m.media-amazon.com/images/I/61pH7vPpLhL.jpg)
![Helix Midnight Mattress, California King - Image 5](https://m.media-amazon.com/images/I/51TSN-IuGTL.jpg)

## Available Options

This product comes in different **Size, Style** options.

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**Shop now:** [https://www.desertcart.jp/products/766719279-helix-midnight-mattress-california-king](https://www.desertcart.jp/products/766719279-helix-midnight-mattress-california-king)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-06*