How does this attach to the chair? From the description it just appears to be placed on top but does that actually hold it in place?

It has a rubbery feeling rough surface on the underside that grips leather really well. I have had it for months and it has never slipped around. Same results on a wooden chair and a plastic covered piano stool. The cover can be removed for washing too.

Can this be used safely in the car while driving?

Possibly though it’s not designed for car use and may foul the seat belts etc. It is quite deep so may act as a booster seat though again it is not designed for car use. Personally, I wouldn’t use it in a vehicle.

Will my bum be sore after sitting on this for several hours at a time?

I have been using this for some months now and my bum doesn’t get sore any more. I do get up and walk about a bit on a more regular basis - so don’t rely just on this - but I have been impressed (and I was sceptical)!

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5 STARS UNITED Ergonomic Seat Cushion – Memory Foam Comfort for Tailbone, Hip & Coccyx Sitting Support – Office Chair, Car, Desk, Wheelchair & Gaming – Black

Product ID: 226546403

Details

Brand
5 STARS UNITED
Colour
Black
Fill material
Memory Foam
Size
Large
Special feature
Memory Foam &

🚗Built-in carry handle for on-the-go comfort

🧠100% memory foam with medium-firm support

🪑46x36x7.5 cm large size fits standard chairs

R3479

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Sit Smart, Work Better – Comfort That Moves With You

TRUSTED BY THOUSANDS - Top-rated with 4.3 stars from 34,000+ users who refuse to compromise on comfort.
VERSATILE PORTABLE - Lightweight with a built-in handle, perfect for office chairs, cars, wheelchairs, and gaming setups.
BREATHABLE EASY CARE - Removable, washable cover with non-slip bottom keeps your cushion fresh and secure all day long.
PREMIUM MEMORY FOAM SUPPORT - 100% memory foam core delivers balanced medium-firm cushioning that adapts to your body shape.
TAILBONE RELIEF ALL DAY COMFORT - Ergonomic U-shaped design reduces pressure on tailbone, hips & lower back for 8+ hours of sitting.

The 5 STARS UNITED Ergonomic Seat Cushion features a large 46x36x7.5 cm U-shaped design crafted from 100% memory foam to provide medium-firm support that alleviates tailbone, hip, and lower back pressure. Its breathable, removable cover and non-slip base ensure durability and hygiene, while the built-in carry handle makes it ideal for office, car, wheelchair, or gaming use. Perfect for professionals who sit long hours and demand ergonomic comfort on the go.

Specifications

ASIN	B07HD8B9SP
Age Range Description	Adult
Best Sellers Rank	72 in Automotive ( See Top 100 in Automotive ) 1 in Car Seat Cushions
Brand Name	5 STARS UNITED
Coin Variety 1	Memory Foam,Seat Cushion
Colour	Black
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (35,009)
Fabric Type	Memory Foam
Fill Material	Memory Foam
Item Dimensions L x W	36L x 46W centimetres
Item Dimensions L x W x H	35.6L x 45.7W x 7.6H centimetres
Item Firmness Description	Medium
Item Shape	Semicircular
Item Type Name	Seat Lifting Cushion
Item Weight	454 g
Manufacturer	5 Stars United LLC
Manufacturer Part Number	6018112977916
Material Type	Memory Foam
Material Type Free	Latex Free
Model Name	Ergonomic Seat Cushion
Model Number	Seat Cushion Pillow for Office Chair
Number of Pieces	1
Pattern	Solid
Product Care Instructions	Foam core is not washable. Cover is machine washable in cold water. Do not bleach, tumble dry, or iron. Air dry only
Recommended Uses For Product	Resting, Sitting, Travelling
Size	Large
Special Features	Memory Foam Core, Breathable & Removable Cover, Non-Slip Base, Built-In Carry Handle
Specific Uses For Product	Hip & Coccyx Sitting Support
Target Use Body Part	Buttocks, Legs, Whole Body
Unit Count	1.0 count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R3479

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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