---
product_id: 384895323
title: "Grand– Extra Wide Ergonomic Seat Support, Sit Straighter Without Effort, Passive Posture Trainer for Office, Home & Car (Black)"
brand: "curble"
price: "€ 312.89"
currency: EUR
in_stock: true
category: "Curble"
url: https://www.desertcart.be/products/384895323-grand-extra-wide-ergonomic-seat-support-sit-straighter-without-effort
store_origin: BE
region: Belgium
---

# Portable for office, home & car Supports up to 1,190 lbs load Extra wide ergonomic design Grand– Extra Wide Ergonomic Seat Support, Sit Straighter Without Effort, Passive Posture Trainer for Office, Home & Car (Black)

**Brand:** curble
**Price:** € 312.89
**Availability:** ✅ In Stock

## Summary

> 🖤 Sit smart, stand tall—your back’s new best friend.

## Quick Answers

- **What is this?** Grand– Extra Wide Ergonomic Seat Support, Sit Straighter Without Effort, Passive Posture Trainer for Office, Home & Car (Black) by curble
- **How much does it cost?** € 312.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/384895323-grand-extra-wide-ergonomic-seat-support-sit-straighter-without-effort)

## Best For

- curble enthusiasts

## Why This Product

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

## Key Features

- • **Toxin-Free Comfort:** Made in Korea with VOC-free materials, ensuring safe, healthy use all day.
- • **Engineered for Endurance:** Firm PU foam supports heavy loads up to 1,190 lbs without losing shape.
- • **Sit Straighter Instantly:** No straps or adjustments—just sit and feel natural posture alignment.
- • **Anywhere, Anytime Support:** Lightweight and portable—transform any seat into an ergonomic haven.
- • **Build Better Habits Effortlessly:** Passive posture trainer that helps you maintain perfect alignment without thinking.

## Overview

The Curble Grand is an extra-wide, ergonomic seat support designed to improve posture passively without straps or adjustments. Made with durable, toxin-free materials and engineered to support up to 1,190 lbs, it’s lightweight and portable for use at the office, home, or in your car. This innovative posture trainer encourages natural spinal alignment, helping busy professionals build healthier sitting habits effortlessly.

## Description

Buy curble Grand– Extra Wide Ergonomic Seat Support, Sit Straighter Without Effort, Passive Posture Trainer for Office, Home & Car (Black): Back & Seat Cushions - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- Polyester
- SIT BETTER INSTANTLY — NO STRAPS, NO ADJUSTMENTS: Just sit down and feel your body naturally guided into a more upright position. Unlike bulky cushions that require constant readjustment, the Curble Grand works passively to support your spine the moment you sit.
- DESIGNED TO SUPPORT, NOT FORCE: Unlike rigid posture braces that aggressively push your back, Curble encourages gentle, natural alignment. Proudly Made in Korea, it has passed rigorous KOTITI and SGS safety tests, ensuring it is completely free of VOCs in the PU foam and harmful substances in the fabric.
- BALANCED FIRMNESS & EXTREME DURABILITY: Engineered to provide structural support, it boasts a maximum compressive load of 1,190 lbs (540 kg). (Note: Bouncing or forcefully pushing back may exceed this limit). It may take a few days for your body to adapt. Start with short 30-minute sessions
- WORKS ANYWHERE YOU SIT: Lightweight and highly portable, it transforms any seat into an ergonomic workstation. Perfect for office chairs, couches, car seats, gaming chairs, or even sitting directly on the floor.
- A MICRO-HABIT BUILDER: Use it consistently at the office, home, or in your car so you never break your healthy sitting habits. Consistency is key to building better posture without even thinking about it.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09HXL9QSZ |
| Age Range Description | Adult |
| Best Sellers Rank | #20,073 in Office Products ( See Top 100 in Office Products ) #112 in Back Cushions & Seat Cushions |
| Brand Name | curble |
| Coin Variety 1 | Lumbar Support |
| Color | Black |
| Customer Reviews | 4.1 4.1 out of 5 stars (426) |
| Fabric Type | Polyester |
| Fill Material | Foam |
| Included Components | Curble Chair |
| Item Dimensions L x W | 6.5"L x 5"W |
| Item Firmness Description | Firm |
| Item Type Name | Back support, Lumbar support |
| Item Weight | 1.02 kg |
| Manufacturer | ablue Co., Ltd. |
| Manufacturer Part Number | CCGB |
| Material Type | Polyamide 6 resin |
| Material Type Free | Lead Free, PBDE Free |
| Model Name | Curble Chair_Grand_PL_Black |
| Model Number | CCGB |
| Number of Pieces | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | Reading, Sitting, Studying |
| Shape | L-shape |
| Size | W16.5 x D12.7 x H13.6 inch |
| Special Features | Ergonomic, Lightweight, Portable |
| Specific Uses For Product | Scoliosis |
| Target Use Body Part | Back |
| Unit Count | 1 Count |

## Product Details

- **Brand:** curble
- **Color:** Black
- **Fill Material:** Foam
- **Size:** W16.5 x D12.7 x H13.6 inch
- **Special Feature:** Ergonomic, Lightweight, Portable

## Images

![Grand– Extra Wide Ergonomic Seat Support, Sit Straighter Without Effort, Passive Posture Trainer for Office, Home & Car (Black) - Image 1](https://m.media-amazon.com/images/I/71ZQ9AoLijL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it work for big butt/high butt people?**
A: It depends on how big is but normally works.

**Q: let me get this straight -- i need the chair AND i need the cover? Whats the difference b/t sitting crosslegged, on top of a small cushion and this?**
A: The cover is not necessary but we recommend to who want a little more cushioning.
The difference b/t Curble Chair and a kneeling chair is that Curble Chair helps you to sit up straight by supporting your back while providing the comfort of your legs.

**Q: Where do find the size chart?**
A: Please refer to the video. Curble Grand is W16.5 x D12.7 x H13.6 inch which is a suitable size for adults. We also have other smaller models for petite, teenagers, and kids.

**Q: Where can I purchase replacement cushions and stops?  How much more cushion does the cover provide?  Thank you.**
A: We are working on the replacement cushion to launch it on Amazon within 2023.
We highly recommend the cover because you can use Curble Chair more comfortably since it covers all the edges of the Curble Chair and provide good ventilation with air mesh material.

## Frequently Bought Together

- Curble GRAND(Extra Wide & Sturdy) – Ergonomic Chair Back Support, Lumbar Support for Good Posture Correction and Back Pain Relief, Perfect for Office Chair, Floor Seat, Work from Home, Patented(Black)
- 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 Belgium*
*Store origin: BE*
*Last updated: 2026-09-23*