---
product_id: 627736616
title: "Knee Pillow for Back Sleeping – Half Moon Bolster Pillow for Legs, Under Knee Pillow for Sleeping on Back, Memory Foam Leg Pillow for Back Pain, Arctic Gray"
brand: "5 stars united"
price: "¥18951"
currency: JPY
in_stock: true
reviews_count: 13
category: "5 Stars United"
url: https://www.desertcart.jp/products/627736616-knee-pillow-for-back-sleeping-half-moon-bolster-pillow-legs
store_origin: JP
region: Japan
---

# Cooling, removable washable cover Premium memory foam core 20.4" x 7.8" ergonomic size Knee Pillow for Back Sleeping – Half Moon Bolster Pillow for Legs, Under Knee Pillow for Sleeping on Back, Memory Foam Leg Pillow for Back Pain, Arctic Gray

**Brand:** 5 stars united
**Price:** ¥18951
**Availability:** ✅ In Stock

## Summary

> 🛌 Sleep Smart, Wake Aligned – Your Back’s New Best Friend

## Quick Answers

- **What is this?** Knee Pillow for Back Sleeping – Half Moon Bolster Pillow for Legs, Under Knee Pillow for Sleeping on Back, Memory Foam Leg Pillow for Back Pain, Arctic Gray by 5 stars united
- **How much does it cost?** ¥18951 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/627736616-knee-pillow-for-back-sleeping-half-moon-bolster-pillow-legs)

## Best For

- 5 stars united enthusiasts

## Why This Product

- Trusted 5 stars united brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cooling & Washable Cover:** Silky smooth, breathable fabric keeps you cool all night and is easy to clean.
- • **Ergonomic Half-Moon Design:** Contours perfectly to knees, legs, hips, and ankles for optimal spinal alignment.
- • **OEKO-TEX Certified Quality:** Made with trusted, non-toxic materials for safe, everyday use and peace of mind.
- • **Versatile Multi-Use Pillow:** Ideal for under knees, between legs, or as a lumbar support—tailored comfort wherever you need it.
- • **Premium Memory Foam Support:** Adaptive foam gently cushions while maintaining steady support to relieve back pain and sciatica.

## Overview

The 5 STARS UNITED Knee Pillow is a premium half-moon bolster designed specifically for back sleepers seeking relief from lower back pain and sciatica. Crafted with high-density memory foam and a breathable, removable cooling cover, it supports knees, legs, hips, and ankles to promote proper spinal alignment and reduce pressure. Its versatile design and OEKO-TEX certified materials make it a hygienic, durable, and essential sleep accessory for millennial professionals prioritizing wellness and comfort.

## Description

Buy 5 STARS UNITED Knee Pillow for Back Sleeping – Half Moon Bolster Pillow for Legs, Under Knee Pillow for Sleeping on Back, Memory Foam Leg Pillow for Back Pain, Arctic Gray: Leg Positioner Pillows - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Love it - Love this pillow. Use it every night and it helps keep my back realigned and my body straight. The cooling factor helps so much in the summer time and I mind it in the winter time, but I love the cold.
Review: Cool comfort!! - Immediately I saw the difference between this one and the other ones that I got and I love this one. I have a serious knee injury and it's so comfy and wonderful. I'm so happy I bought it and you will be happy to. Very high-quality material. It's excellent. You could use it for your head. It's just a wonderful feeling pillow.

## Features

- 𝗨𝗻𝗱𝗲𝗿 𝗞𝗻𝗲𝗲 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 𝗳𝗼𝗿 𝗕𝗮𝗰𝗸 𝗦𝗹𝗲𝗲𝗽𝗶𝗻𝗴: Half moon bolster pillow supports the knees, legs, hips, and ankles while lying on your back, helping create a more comfortable sleeping position
- 𝗕𝗮𝗰𝗸 𝗣𝗮𝗶𝗻 & 𝗦𝗰𝗶𝗮𝘁𝗶𝗰𝗮 𝗖𝗼𝗺𝗳𝗼𝗿𝘁: Designed for people who sleep with a pillow under their legs to help ease lower back pressure, stiffness, and sciatica-related discomfort
- 𝗖𝗼𝗺𝗳𝗼𝗿𝘁𝗮𝗯𝗹𝗲 𝗟𝗲𝗴 𝗣𝗶𝗹𝗹𝗼𝘄 𝗳𝗼𝗿 𝗕𝗲𝗱: Use as a leg pillow for back sleeping, knee bolster for sleeping, or pillow for under knees while sleeping. Also works between the knees or under the ankles
- 𝗦𝘂𝗽𝗽𝗼𝗿𝘁𝗶𝘃𝗲 𝗠𝗲𝗺𝗼𝗿𝘆 𝗙𝗼𝗮𝗺: Premium memory foam gently contours to your legs, knees, and thighs while providing steady support throughout the night. Standard size: 20.4" x 7.8" x 4.8"
- 𝗥𝗲𝗺𝗼𝘃𝗮𝗯𝗹𝗲 𝗪𝗮𝘀𝗵𝗮𝗯𝗹𝗲 𝗖𝗼𝘃𝗲𝗿: Silky cooling cover feels smooth and cool to the touch, helping keep the pillow comfortable for hot sleepers and warm summer nights. Removes easily for washing, and replacement covers are sold separately for added convenience
- 𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 𝗨𝘀𝗲𝘀: Can also be used as a light leg elevation pillow, foot pillow, leg bolster, lower back pillow for sleeping, or small lumbar support pillow for bed
- 𝗢𝗘𝗞𝗢-𝗧𝗘𝗫 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗖𝗼𝘃𝗲𝗿: Made with OEKO-TEX STANDARD 100 certified materials for trusted fabric quality and everyday comfort

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CPM71F42 |
| Age Range Description | Adult |
| Best Sellers Rank | #51,420 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #37 in Leg Positioner Pillows |
| Brand | 5 STARS UNITED |
| Brand Name | 5 STARS UNITED |
| Color | Arctic Gray |
| Customer Reviews | 4.2 out of 5 stars 521 Reviews |
| Fabric Type | 100% Memory Foam |
| Fill Material | Memory Foam |
| Global Trade Identification Number | 00850026731613 |
| Item Dimensions L x W | 20.4"L x 7.8"W |
| Manufacturer | 5 STARS UNITED LLC |
| Manufacturer Part Number | HALF-MOON |
| Material Features | Breathable |
| Material Type | Memory Foam |
| Model Name | Half Moon Pillow |
| Model Number | Half Moon Pillow |
| Number of Pieces | 1 |
| Pattern | Solid |
| Recommended Uses For Product | Under-knee pillow for back sleeping — can also be used between legs, under lower back, or under ankles to support alignment, reduce pressure, and enhance comfort. |
| Shape | Cylindrical |
| Size | Standard |
| Special Feature | Memory Foam Core, Soft Knit Cover, Removable & Washable |
| Special Features | Memory Foam Core, Soft Knit Cover, Removable & Washable |
| Target Use Body Part | Legs |
| Unit Count | 1 Count |

## Product Details

- **Brand:** 5 STARS UNITED
- **Special Feature:** Ergonomic Shape, Memory Foam Support, Multi-Position Use, Orthopedic Design, Removable Washable Cover
- **Color:** Arctic Gray
- **Size:** Standard
- **Fill Material:** Memory Foam

## Images

![Knee Pillow for Back Sleeping – Half Moon Bolster Pillow for Legs, Under Knee Pillow for Sleeping on Back, Memory Foam Leg Pillow for Back Pain, Arctic Gray - Image 1](https://m.media-amazon.com/images/I/81jha280d2L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love it
*by J***A on August 7, 2026*

Love this pillow. Use it every night and it helps keep my back realigned and my body straight. The cooling factor helps so much in the summer time and I mind it in the winter time, but I love the cold.

### ⭐⭐⭐⭐⭐ Cool comfort!!
*by M***E on June 18, 2026*

Immediately I saw the difference between this one and the other ones that I got and I love this one. I have a serious knee injury and it's so comfy and wonderful. I'm so happy I bought it and you will be happy to. Very high-quality material. It's excellent. You could use it for your head. It's just a wonderful feeling pillow.

### ⭐⭐⭐⭐ It works fine
*by K***N on January 18, 2025*

I bought this to replace a standard pillow I was using. This gives the support under my knees where needed. It is memory foam and pliable but much harder than I anticipated but I am getting used to it. Hoping it will soften a bit over time

## Frequently Bought Together

- 5 STARS UNITED Knee Pillow for Back Sleeping – Cooling Cover - Memory Foam Cushion for Sciatica Pain Relief – Under Leg Support for Sleeping on Back – Half Moon Bolster for Bed, Arctic Gray
- 5 STARS UNITED Knee Pillow for Side Sleepers - Hip Pain Relief - Cooling Cover - Memory Foam Leg Cushion for Side Sleeping - Between Legs Pillow for Sciatica & Lower Back Pain, Arctic Gray
- Contour Legacy Cool Leg & Knee Foam Support Pillow for Side Sleepers Soothing Relief for Back, HIPS, Knees, Joints, Nerves & Muscles

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-27*