--- product_id: 398553568 title: "Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black" brand: "comfortanza" price: "$173.18" currency: USD in_stock: true reviews_count: 8 category: "Comfortanza" url: https://www.desertcart.us/products/398553568-firm-18x18x3-memory-foam-seat-cushion-for-home-office-car store_origin: US region: United States of America --- # Waterproof washable velvety cover Non-slip base for stable seating 18x18x3 inch firm memory foam Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black **Brand:** comfortanza **Price:** $173.18 **Availability:** ✅ In Stock ## Summary > 🖤 Elevate your seat, elevate your day—comfort that commands attention! ## Quick Answers - **What is this?** Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black by comfortanza - **How much does it cost?** $173.18 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/398553568-firm-18x18x3-memory-foam-seat-cushion-for-home-office-car) ## Best For - comfortanza enthusiasts ## Why This Product - Trusted comfortanza brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Clean & Care:** Removable waterproof cover with long zipper, machine washable for hassle-free freshness. - • **Versatile Comfort On-The-Go:** Ideal for home, office, car, stadium, or travel—comfort that moves with you. - • **Stay Secure, Sit Confidently:** Non-slip base grips any surface without marking furniture—stability meets style. - • **Boost Your Seating Height by 3 Inches:** Perfect for desk work, driving, or dining—empower your posture and confidence. - • **Ergonomic Support for All-Day Comfort:** Relieve sciatica, back & hip pressure with premium high-density memory foam. ## Overview The COMFORTANZA Firm 18x18x3 Memory Foam Seat Cushion combines high-density memory foam with a soft, waterproof velvety cover and a non-slip base to deliver superior support and stability. Designed to relieve pressure on the tailbone, hips, and back, it raises seating height by 3 inches for improved posture and ease of movement. Its removable, machine-washable cover ensures easy maintenance, while its versatile design fits seamlessly into home, office, car, or travel settings. Backed by a 180-day warranty and praised by thousands, this cushion is the ultimate upgrade for anyone seeking lasting comfort and ergonomic support. ## Description Product description ## Features - UNMATCHED COMFORT AND SUPERIOR SUPPORT: Are you tired of back pain and discomfort after long hours of sitting? Our 18x18x3 firm cushion, crafted with premium high-density memory foam, is here to provide the relief you need. It eases pressure on your tailbone, hips, back, and legs, turning any chair into a comfortable, supportive space. Wrapped in a soft, velvety fabric, it creates a cozy retreat, making it easier to stay comfortable whether working, relaxing, or enjoying time with family. - SEAT-RAISING FEATURE: Are you too short to sit comfortably at your desk, dining table, or behind the wheel? Has your favorite chair become too low with the years? Our cushion's 3-inch lift allows you to reach the perfect height and makes everyday tasks easier. Whether you're a senior, pregnant woman, or recovering from surgery, this cushion gives you the independence you deserve. No more struggling to get out of your seat, feel empowered and confident as you move freely with the support you need! - EASY MAINTENANCE WITH WATERPROOF PROTECTION: The removable, washable cover with an integrated waterproof layer protects your cushion from spills, stains, or sweat. The long, L-shaped zipper makes removing the cover quick and easy. Simply unzip, toss it in the washing machine, and enjoy a fresh, clean cushion every time without the hassle, relieving you of the burden of cleaning and maintenance. - NON-SLIP STABILITY FOR PEACE OF MIND: The light gray, non-slip bottom keeps your cushion securely in place on any surface, preventing unwanted movement and ensuring a safe, stable seat every time. Plus, it won’t stain or mark your furniture, giving you peace of mind while you sit. This feature is designed to make you feel secure and confident in your seat, no matter what surface you put your cushion on. - HIGHLY VERSATILE: Our seat pillows are designed to improve posture wherever you want, giving you the power to bring additional comfort to your home, dorm room, office, and car. Take it to a restaurant, classroom, church, movie theater, or stadium. Make your outdoor and traveling time more enjoyable with these thick chair pads. Although you can use our seat pillows outside your house, bring them indoors when you’re done, giving you control over your comfort no matter where you are. - QUALITY YOU CAN FEEL: Experience the exquisite craftsmanship that goes into every stitch and contour. Our cushion is designed for durability, ensuring lasting comfort and timeless elegance. Comfortanza stands behind its products. We offer a 30-day money-back guarantee and a 180-day replacement warranty to ensure complete satisfaction and peace of mind. - PERFECT GIFT IDEA: Share the gift of comfort and independence with family and friends. Perfect for anyone seeking extra support, it’s an ideal present for seniors, expecting mothers, or anyone needing a little extra lift. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09LTYP7SQ | | Age Range Description | Adult, Teens | | Brand | COMFORTANZA | | Brand Name | COMFORTANZA | | Coin Variety 1 | Memory Foam,Seat Cushion | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 2,075 Reviews | | Fabric Type | Polyester, Polyester, Polyester, Polyester, Polyester | | Fill Material | Memory Foam | | Item Dimensions L x W | 18"L x 18"W | | Item Dimensions L x W x H | 18"L x 18"W x 3"H | | Item Firmness Description | Firm | | Item Type Name | Seat Cushion | | Item Weight | 3 Pounds | | Manufacturer | COMFORTANZA | | Manufacturer Warranty Description | Manufacturer warranty for 180 days from date of purchase | | Material Features | Soft Velvety Cover, Non-Slip Base | | Material Type | Memory Foam | | Model Name | ChairCushion | | Model Number | CC009BL | | Number of Pieces | 1 | | Pattern | Geometric | | Product Care Instructions | Cover - Machine Wash Warm, Tumble Dry Low, Foam Pad - Spot Clean Only | | Recommended Uses For Product | Seat Cushion, Back Cushion | | Shape | Square | | Size | 18x18x3" | | Special Feature | Non-Slip Base, Washable Cover with Waterproof Layer | | Special Features | Non-Slip Base, Washable Cover with Waterproof Layer | | Specific Uses For Product | Seat cushion, Back cushion | | Target Use Body Part | Body | | Unit Count | 1 Count | ## Product Details - **Brand:** COMFORTANZA - **Color:** Beige - **Fill Material:** Memory Foam - **Size:** FIRM - **Special Feature:** Non-Slip Base, Washable Cover with Waterproof Layer ## Images ![Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black - Image 1](https://m.media-amazon.com/images/I/81rwP9uAmqL.jpg) ![Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black - Image 2](https://m.media-amazon.com/images/I/71Zt9RsCpgL.jpg) ![Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black - Image 3](https://m.media-amazon.com/images/I/81+kbnaqhsL.jpg) ![Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black - Image 4](https://m.media-amazon.com/images/I/71rRckmdLrL.jpg) ![Firm 18x18x3 Memory Foam Seat Cushion for Home, Office, Car - Washable Velvety Cover with Waterproof Layer & Non-Slip Base - Booster Cushion - Sciatica & Back Pain Relief - Black - Image 5](https://m.media-amazon.com/images/I/91Y+dsWMelL.jpg) ## Available Options This product comes in different **Color, Size, Set** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by O***S on November 28, 2025* ### ⭐⭐⭐⭐⭐ Review *by B***A on June 30, 2025* ### ⭐⭐⭐⭐ Review *by T***R on August 5, 2022* ## Frequently Bought Together - Comfortanza Chair Seat Cushion - 18x18x3 Inches Medium Firm Pure Memory Foam Large Non-Slip Pads for Kitchen, Dining, Office Chairs, Car Seats - Booster Cushion - Comfort and Back Pain Relief - Black - ComfySure Extra-Large Bariatric Seat Cushion for Overweight Users Btwn 200 - 500 Lbs: Contoured Memory Foam Therapeutic Car Chair Support Pillow- Relieves Back, Sciatica, Coccyx & Tailbone Pain (Grey) by ComfySure - Drive Medical Deluxe Two Button Folding Walker With Wheels --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/398553568-firm-18x18x3-memory-foam-seat-cushion-for-home-office-car](https://www.desertcart.us/products/398553568-firm-18x18x3-memory-foam-seat-cushion-for-home-office-car) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-07*