---
product_id: 735090585
title: "CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size"
brand: "core products"
price: "¥3328"
currency: JPY
in_stock: false
reviews_count: 6
url: https://www.desertcart.jp/products/735090585-coreproducts-core-product-tri-core-bed-pillow-pillow-medium-size
store_origin: JP
region: Japan
---

# Variable firmness zones Hand washable fabric Tri-core ergonomic design CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size

**Brand:** core products
**Price:** ¥3328
**Availability:** ❌ Out of Stock

## Summary

> 🛌 Elevate your sleep game with tri-core precision comfort!

## Quick Answers

- **What is this?** CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size by core products
- **How much does it cost?** ¥3328 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/735090585-coreproducts-core-product-tri-core-bed-pillow-pillow-medium-size)

## Best For

- core products enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Bestseller:** Featured in Croissant magazine and loved by thousands for proven neck relief.
- • **Hygienic & Easy Care:** Hand washable materials keep your pillow fresh and allergen-free.
- • **Ergonomic Neck Support:** Contours perfectly to cervical vertebrae for all-night spinal alignment.
- • **Adaptive Firmness Zones:** Different heights and firmness across pillow zones for personalized comfort.
- • **Versatile Sleep Postures:** Optimized for both back and side sleepers to reduce tossing and turning.

## Overview

The CoreProducts Tri-Core Medium Bed Pillow is a bestselling ergonomic pillow designed to support the natural curve of your cervical spine. Featuring variable firmness zones and a unique tri-core shape, it adapts to both back and side sleepers for optimal neck and head support. Made with a soft yet supportive fiber fill and a washable cotton-polyester cover, this pillow combines comfort, hygiene, and durability. Recognized in lifestyle magazines and favored by users seeking relief from neck pain, it’s a must-have for professionals prioritizing restorative sleep.

## Description

Product description America's Core Best Selling, Classic and Popular Pillow. This is a popular pillow that has a unique shape that supports the neck and supports the curve of the cervical vertebrae, and is also introduced in magazines such as Croissant as a pillow that supports the neck well. The center recess provides a good stability during your back posture, and the height and firmness are slightly different depending on the location, such as both sides and four corners, so you can sleep perfectly in your sleep. The tri-core series is a gentle type that is made with a slightly softer feel on the pillow. Available in 3 sizes, Large is "Trico", Medium is "Midcore", Small is separated from "Petticore". This size is "Midcore". Ingredients Interior: Core Fill Fiber, 100% Polyester Exterior: 50% Polyester, 50% Cotton

Review: ストレートネックの私にはやっぱり合ってます。起床時、首が痛くなくなりましたし、首の変な音もなくなりました。ただ、首元がへたるのが若干早いので、比較的頻繁に替えないと効果がなくなってしまうのが難点でマイナス1にしました。
Review: This is the best pillow I've ever owned. For context, I am 4'10" so naturally, I have a shorter neck. I try to sleep on my back to help keep my spine aligned, and this pillow properly supports my neck and back of my head from underneath. The sides of the pillow also keep my head in place so I'm less likely to roll on my side, discouraging me from being a side sleeper again. It's not too soft nor too firm, and when I received the delivery, the pillow arrived brand new and unopened with no unusual odours. I also have a medium-firm memory foam mattress so this pillow sits well on it and doesn't get bent out of shape or lose its form.

## Features

- Best Selling Sleep Pillow! A popular pillow introduced in the magazine of Croissant
- Designed with attention to detail to fit the curve of the cervical vertee!
- The height and firmness of the product may vary depending on the location, so you can use it in multiple ways
- It can also be used for both back and side postures
- It can be washed (hand washed), so it is always clean

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007ZO6DK |
| ASIN  | B0007ZO6DK |
| Color | white |
| Customer Reviews | 3.6 3.6 out of 5 stars (960) |
| Date First Available | August 8, 2012 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | FIB-222 |
| Manufacturer  | CoreProducts コアプロダクト |
| Material Type | コットン, ポリエステル |
| Product Dimensions | 55.88 x 38.1 x 0.25 cm; 793.79 g |
| Product Dimensions  | 55.88 x 38.1 x 0.25 cm; 793.79 g |
| Special Features | Gentle type |
| Target Age Range Description | 大人 |
| Target Gender | Unisex |

## Product Details

- **Brand:** Core Products
- **Color:** white
- **Fill Material:** ポリエステル
- **Size:** 56cm x 38cm
- **Special Feature:** Gentle type

## Images

![CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size - Image 1](https://m.media-amazon.com/images/I/61NB5iN9w5L.jpg)
![CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size - Image 2](https://m.media-amazon.com/images/I/81u3KNh7R3L.jpg)
![CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size - Image 3](https://m.media-amazon.com/images/I/81IB8ognT1L.jpg)
![CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size - Image 4](https://m.media-amazon.com/images/I/719tvQ334pL.jpg)
![CoreProducts Core Product Tri-Core Bed Pillow Pillow, Medium Size - Image 5](https://m.media-amazon.com/images/I/81YM3YnBQCL.jpg)

## Questions & Answers

**Q: Can anyone tell me when sleeping on your side if your head slides back into the center of the pillow and if it does- does it affect your neck pain?**
A: For those saying their head slides back into the middle when sleeping on their side, perhaps they need the softer version or the smaller version of this pillow. I've had this pillow for 5 or so years now and am planning to replace it with the same.  My chiropractor had these in his office and offered a free trial.  It does take a little bit of adjustment/getting used to, but waking up with a blazing headache has practically ceased. I used to wake up with them two to three days per week and now if I'm unlucky, once per month. For me, this pillow has been a godsend.

**Q: is this pillow so firm that when sleeping on your side your ear begins to throb?**
A: Yes.  The support is very good, and firm.  However, as a side sleeper, yes this pillow causes ear pain.  And, for me I started to develop something like callous on the center of the outer part of my ears.  The skin became very irritated and started to peel. That went on for nearly a year.  I kept using the pillow because it provided very good support and let me sleep well, better than other cervical pillows I have used.  Eventually I became used to the ear problem, and now I rarely get irritation.
The maker of this pillow really needs to address the irritation problem.  I think that a softer thin layer over the firm support material could help, by allowing the ear to rest into a softer thin layer, while the firmer support does it's job.
I've had this pillow since 2018.  I want a new pillow.  I am looking at other newer pillows that may not irritate my ears.

**Q: how long do they last?**
A: Not sure how long they last yet. I've only had it for about a month. It seems to be very well made, and I expect it to last at least as long as a normal pillow. The fill is dense, and seems like it won't clump up as fast as a normal pillow.

**Q: I am a side-sleeper.  Sometimes my ears hurt after a night of sleeping on them.  Does the trapezoid indentation prevent this from happening?**
A: The trapezoid indentation is so low, that I'm unable to place my head in the indentation without my head tilting in an awkward / downward angle.  The instructions to the pillow indicate that the areas to the left and right of the indentation are used for side sleeping.  I've found these areas are unusally firm and my ears become sensitive after several hours of sleeping on these areas.   In addition, after 2 - 3 months of using the pillow I believe the "small" version might have been better for me (I'm 5'5" tall).

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by ス***グ on December 10, 2017*

ストレートネックの私にはやっぱり合ってます。起床時、首が痛くなくなりましたし、首の変な音もなくなりました。ただ、首元がへたるのが若干早いので、比較的頻繁に替えないと効果がなくなってしまうのが難点でマイナス1にしました。

### ⭐⭐⭐⭐⭐ Review
*by J***E on February 1, 2026*

This is the best pillow I've ever owned. For context, I am 4'10" so naturally, I have a shorter neck. I try to sleep on my back to help keep my spine aligned, and this pillow properly supports my neck and back of my head from underneath. The sides of the pillow also keep my head in place so I'm less likely to roll on my side, discouraging me from being a side sleeper again. It's not too soft nor too firm, and when I received the delivery, the pillow arrived brand new and unopened with no unusual odours. I also have a medium-firm memory foam mattress so this pillow sits well on it and doesn't get bent out of shape or lose its form.

### ⭐⭐⭐⭐⭐ Review
*by A***R on June 5, 2016*

Really pleased with this, after a good few months of not sleeping using normal soft pillows this has been a god send! Admittedly it took a couple of nights to get used to but it's really helped. I have issues with my neck, currently awaiting surgery for cervical disk removal and nerve decompression which has meant laying in bed with a normal feather pillow was just not comfortable. The way this pillow supports my neck has really helped, less cramping in my legs and hands, little strange getting used to the dip which your head fits into as it means you lay perfectly flat but it works!!! Would definitely recommend for anyone with similar issues.

## Frequently Bought Together

- Core Products Tri-Core Gentle-Cervical Support Pillow for Neck, Shoulder, and Back Pain Relief - Ergonomic Orthopedic Contour - for Back and Side Sleepers - Assembled in The USA - Gentle, Midsize
- Core Products Original Tri-Core Firm-Cervical Support Pillow for Neck, Shoulder, & Back Pain Relief-Ergonomic Orthopedic Contour Pillow for Back and Side Sleep-Assembled in USA- Firm, Full Size

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-24*