Is this cushion thick enough for a hard wooden chair?

At about 3 cm it adds noticeable softness to a firm seat. It is thicker than a flat pad but not a deep cushion, so very hard seats will still feel firm underneath.

Does it stay in place on a chair?

There are no straps or grip base described, so it can shift on smooth seats. Many shoppers put it under a fitted cover or against the chair back to keep it steady.

Can I use it in a car?

Yes, the square shape fits most car seats and the foam softens long drives. Without a strap it may slide when you get in and out.

The cover material and washing instructions are not specified, so spot clean the surface and air it out. Do not machine wash the foam core.

Will it help with tailbone or sciatic pain?

It is a flat pad with no cutout, so it pads the whole seat rather than relieving pressure at one point. For targeted relief, a cushion with a coccyx cutout is the better match.

Does the foam get hard in cold weather?

Memory foam stiffens when cold and softens as it warms. In a cold car it may feel firm for the first few minutes before it molds to you.

Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black

Best price now

$19.29at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

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Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black

Best price now

$19.29at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

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It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Lowest price today: $19.29 at Walmart (checked Nov 13, 2026).

Our take on the Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black

A square memory foam seat pad, 35 by 35 cm and about 3 cm thick, made of polyurethane foam in a black cover. It is meant to add soft support to hard chairs for long sitting at home, in the car or at a desk. The extra thickness and large square shape set it apart from thin flat chair pads, but it has no straps, no cutout and no cooling gel, so it is a basic pad rather than an ergonomic cushion. It suits shoppers who want simple padding on a firm seat, not relief for a specific back or tailbone problem.

Best forHard wooden or plastic chairsLong desk and dining sessionsCar seats and home office chairsShoppers wanting simple padding, not an ergonomic cushion

Pros

Thicker than typical flat chair pads
Large 35x35 cm square covers most seat bases
Memory foam molds to the body under weight
Plain black cover suits most chairs
Light and easy to move between seats

Cons

No straps or non-slip base, so it can slide
No cutout or gel layer for tailbone or cooling
About 3 cm thick, so it adds modest height only
Cover material and washing instructions are not specified
Firmness and rebound vary with room temperature

Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black prices at every store

WalmartNew
In stockSold by HYongzeng
$19.29+ $2.99 shippingChecked 1 h ago
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Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black price history

$19.29$11.51

Nov 1Nov 13

Lowest price we've seen: $11.51 on Nov 1 at Walmart; highest $19.29 on Nov 13. Tracked across 1 store since Nov 1.

About the Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black

This is a memory foam seat cushion in black. It is thickened and enlarged to give soft support during long periods of sitting. It can be used in the car or at home.

The cushion is made of polyurethane and comes filled. It measures 35 x 35 x 3 cm.

Material: Polyurethane
Color: Black
Dimensions: 35 x 35 x 3 cm
Weight: 0.6 lb
Filled: Yes
Use: Car and home

Specifications

Is Filled: Y
Product Net Content Parent: 0.6 Pound
size: 13.78" x 13.78"
color: Black

Questions and answers

Is this cushion thick enough for a hard wooden chair?: At about 3 cm it adds noticeable softness to a firm seat. It is thicker than a flat pad but not a deep cushion, so very hard seats will still feel firm underneath.
Does it stay in place on a chair?: There are no straps or grip base described, so it can shift on smooth seats. Many shoppers put it under a fitted cover or against the chair back to keep it steady.
Can I use it in a car?: Yes, the square shape fits most car seats and the foam softens long drives. Without a strap it may slide when you get in and out.
How do I clean it?: The cover material and washing instructions are not specified, so spot clean the surface and air it out. Do not machine wash the foam core.
Will it help with tailbone or sciatic pain?: It is a flat pad with no cutout, so it pads the whole seat rather than relieving pressure at one point. For targeted relief, a cushion with a coccyx cutout is the better match.
Does the foam get hard in cold weather?: Memory foam stiffens when cold and softens as it warms. In a cold car it may feel firm for the first few minutes before it molds to you.
Where is the Memory Foam Seat Cushion Extra Thick Large Chair Pad 35x35cm Black cheapest?: At Walmart, for $19.29, as of our latest check.