---
product_id: 663485051
title: "ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black"
brand: "protoarc"
price: "$139.21"
currency: USD
in_stock: true
reviews_count: 13
category: "Proto Arc"
url: https://www.desertcart.us/products/663485051-protoarc-ergonomic-coccyx-seat-cushion-for-office-desk-chair-pressure
store_origin: US
region: United States of America
---

# High-density memory foam 125% denser than standard U-shape tailbone cut-out for pressure relief 5-zone ergonomic support for balanced posture ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black

**Brand:** protoarc
**Price:** $139.21
**Availability:** ✅ In Stock

## Summary

> 🪑 Sit Smart, Work Sharp — Elevate Your Comfort Game

## Quick Answers

- **What is this?** ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black by protoarc
- **How much does it cost?** $139.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/663485051-protoarc-ergonomic-coccyx-seat-cushion-for-office-desk-chair-pressure)

## Best For

- protoarc enthusiasts

## Why This Product

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

## Key Features

- • **Stay-Put Stability:** Non-slip bottom grips your chair firmly, so you stay aligned and supported without constant adjustment.
- • **Memory Foam Mastery:** Premium 10cm thick, 23.5oz high-density foam molds perfectly to your body, ensuring resilient support that won’t flatten.
- • **Clean & Carry Convenience:** Removable, breathable cover with zipper is machine washable; built-in handle makes it your on-the-go comfort essential.
- • **Universal Fit, Anywhere Use:** Standard size fits all body types—including pregnant women—and adapts seamlessly from office chair to car seat to gaming throne.
- • **Tailbone Relief, Elevated Comfort:** Innovative U-shape design with coccyx cut-out redistributes pressure to banish discomfort during long hours seated.

## Overview

The ProtoArc Ergonomic Coccyx Seat Cushion features a unique U-shaped tailbone cut-out and 5-zone high-density memory foam that’s 125% denser than standard cushions, delivering superior pressure distribution and hip support. Designed for all-day comfort, it includes a non-slip base and a breathable, machine-washable cover with a convenient handle. Perfect for office, car, home, or travel, it supports a healthy posture for users under 100kg, making it a must-have ergonomic upgrade for professionals seeking pain-free productivity.

## Description

Product Description ProtoArc Seat Cushion Unveiling A Seat Cushion Designed With Meticulous Care Odor-free, Safer for you The Perfect Companion For All Your Seating Needs Whether you're working tirelessly at your office desk, embarking on a long road trip, relaxing at home, or enjoying the great outdoors, our seat cushion offers exceptional comfort and support wherever you go Choose Your Favorite Available in 3 sophisticated colors including classic black, sleek dark gray, and rich coffee, this seat cushion is not just a functional addition to your workspace but a stylish accent that complements any decor ProtoArc Health Office Workspaces SC Butterfly Seat Cushion EC100 Ergonomic Chair Ergonomic keyboard mouse Ergonomic keyboard

Review: It's a really good product ! - It's a really good product ! Contoured to accommodate your posterior at all points, except coxccys to provide relief from pain. It's comfortable to sit on, having that right blend of softness, yet firm. I bought it for my upcoming hemorrhoid operation, which I haven't received my appointment yet.
Review: CComfortable cushion - Pretty comfortable and has stopped the pain I was getting sat at my computer. Others have said the cushion doesn't slip but I can't agree. This may be down to the chair I am using but it's easy enough to push back into place. I would ta== rather have to occasionally move the cushion than suffer the pain in my tailbone.

## Features

- Innovative U-Shape Design: Unique tailbone cut-out even weight distribution, and raised sides for hip support. Pre-shaped foam molds to your body for exceptional comfort and support. Upgrade to optimal comfort with our coccyx cushion (18"L x 16"W x 4"H) and transform your sitting experience today. Note: For optimal comfort, 1.Please measure your seat size in advance to ensure a perfect fit. 2.we recommend this seat cushion for office chair for individuals weighing less than 100 kg. For weights exceeding 100kg, we recommend the upgraded version SC Butterfly XL
- Ergonomic Seat Cushion: The split and orthopedic design helps disperse body weight evenly across the hips and thighs, encouraging a comfortable posture for long-sitting groups
- Premium Certified Quality: With 5-zone ergonomic support, 23.5oz 10cm thick high-density memory foam, 125% denser than standard cushions, delivers firm, resilient support without flattening out; crafted with skin-friendly foam and breathable fabric, it retains shape for long-term use while complying with EU REACH SVHC ≤0.1% regulations for safe, reliable daily sitting
- Ease Of Use: Built-in handle to make it easy to carry. Breathable cover with zipper closure for easy machine washing. Non-slip bottom ensures grip, especially on leather seats, for secure placement. Removable cover maintains freshness, while the non-slip feature enhances stability
- Take Comfort Anywhere: ProtoArc seat cushion reduces pressure on lower back and hip for all-day comfort, perfect for office, home desk chairs, car seats, road trips, gaming chairs and wheelchairs. Standard size fits all body shapes, including pregnant women, ensuring superior support and comfort anytime, anywhere
- Tips: 1. It may take 1-2 weeks to adjust to the cushion's shape for the first time. Many users have found it offers consistent comfort during prolonged use. 2.The cushion comes vacuum sealed so you will need to let it expand for an hour or two before first use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D2Y1FMT6 |
| Age Range Description | 3 years old+ |
| Best Sellers Rank | 38,799 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 94 in Back & Seat Cushions |
| Brand | ProtoArc |
| Brand Name | ProtoArc |
| Colour | Black |
| Country Of Origin | China |
| Cover Material | Cotton |
| Customer Reviews | 4.4 out of 5 stars 2,320 Reviews |
| Fabric Type | Pilling Resistant Cotton |
| Fill material | Memory Foam |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions L x W | 45.7L x 40.7W centimetres |
| Item Firmness Description | Soft |
| Item Shape | Semicircular |
| Item Thickness | 10.16 Centimetres |
| Item Weight | 1 Kilograms |
| Manufacturer | ProtoArc |
| Manufacturer Part Number | SC Butterfly |
| Material Features | Breathable, Hypoallergenic |
| Model Name | SC Butterfly |
| Model Number | SC Butterfly |
| Number of Items | 1 |
| Other Special Features of the Product | Adaptive Memory Foam, Anti-Slip, Concealed Zipper, Pressure Distribution Design, Removable Cover |
| Pattern | Plain |
| Pillow Type | Furniture Cushion |
| Pillow type | Furniture Cushion |
| Pillowcase Length | 18 Inches |
| Product Care Instructions | Dry Clean Only, Machine Wash |
| Recommended Uses For Product | Reading, Sitting, Studying, Travelling, Working |
| Shape | Semicircular |
| Size | L |
| Sleeping Bag Filling Material | Memory Foam |
| Style Name | Contemporary |
| Unit Count | 1.0 count |

## Product Details

- **Fill material:** Memory Foam
- **Pillow type:** Furniture Cushion
- **Colour:** Black
- **Size:** L
- **Brand:** ProtoArc

## Images

![ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black - Image 1](https://m.media-amazon.com/images/I/81EhqtIdQwL.jpg)
![ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black - Image 2](https://m.media-amazon.com/images/I/61Jz07Y1F7L.jpg)
![ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black - Image 3](https://m.media-amazon.com/images/I/6133SLimJtL.jpg)
![ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black - Image 4](https://m.media-amazon.com/images/I/71Kc1gAIARL.jpg)
![ProtoArc Ergonomic Coccyx Seat Cushion for Office Desk Chair | Pressure Distribution, Hip and Tailbone Support, for Car, Home, Split Design, All Day Comfort, Black - Image 5](https://m.media-amazon.com/images/I/61Qc-UOkNpL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ It's a really good product !
*by J***I on 21 December 2025*

It's a really good product ! Contoured to accommodate your posterior at all points, except coxccys to provide relief from pain. It's comfortable to sit on, having that right blend of softness, yet firm. I bought it for my upcoming hemorrhoid operation, which I haven't received my appointment yet.

### ⭐⭐⭐⭐⭐ CComfortable cushion
*by S***K on 21 February 2026*

Pretty comfortable and has stopped the pain I was getting sat at my computer. Others have said the cushion doesn't slip but I can't agree. This may be down to the chair I am using but it's easy enough to push back into place. I would ta== rather have to occasionally move the cushion than suffer the pain in my tailbone.

### ⭐⭐⭐⭐ Takes a week to adjust, but helped with tailbone discomfort
*by D***N on 6 November 2025*

Takes some getting used to, but it does help over time I bought this because I was getting pain in my tailbone area from sitting for long periods at my desk (work and gaming). At first it felt a bit strange to sit on. For me, it took about a week of daily use to get used to it, and that’s around the point where I started noticing the pressure easing and the discomfort improving. Once I settled into it, it did help make longer sitting sessions more comfortable. The design spreads your weight more evenly and takes the pressure off the tailbone. So if it feels odd at first, I’d say stick with it and give it time rather than judging it straight away. The cover has a zip so you can take it off to wash, which is a nice practical touch. Mine has held its shape well so far and still looks the same after regular use. The only thing to mention is the price. It works, but it does feel a little on the higher side compared to some similar options. I’d say it’s good value if you can grab it when it’s discounted. I got mine at full price. Overall, not an instant fix, but it genuinely helped after a bit of adjustment time. Worth considering if you spend a lot of hours sitting. I have mine on a secret lab titan chair for size comparison in my pictures.

## Frequently Bought Together

- ProtoArc Seat Cushion for Tailbone Pain Relief, Office Chair Cushion, Coccyx Cushion, Ergonomic Memory Foam Seat Cushion for Home, Car, Pressure Relief Pad for Hip, Coccyx, All Day Comfort - Black
- Everlasting Comfort Doctor Recommended Memory Foam Seat Cushion for Office Chairs & Car Seat - Ergonomic Office Desk Accessories for Tailbone Pain Relief, Sciatica & Back Support
- QUTOOL Lumbar Support Pillow for Office Chair,Office Home Essentials,Back Support Pillow for Car, Chair Cushions,Back Pain Relief Improve Posture,Mesh Cover Double Adjustable Straps

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-30*