How long do I need to let this “rise” out of the packaging before I use it?

The moment you cut into the plastic, it should rise. The package reminds me of the vacuum-seal products on the market.

Is it to soft that it won’t support your tailbone?

It has good support, however if you are tall it raises you up a bit. I use it on trips longer than 2 hours and find it helps.

I'm a large man at 300 lbs? Will it work or will I just pancake it?

It's a little more than straight mem foam so it's not too bad, I am 300+ lbs as well and I use it in the car , seems to work well....

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SAIREIDER Seat Cushion and Lumbar Support Pillow for Office Chair, Memory Foam Car Seat Cushions Back Support Pillows, Help Relieve Pain of Back, Lumbar, Tailbone and Sciatic Nerve（Black）

Product ID: 506373937

Details

Brand
SAIREIDER
Color
Seat
Fill Material
Memory Foam
Size
Universal
Special Feature
Adjustable

🔒Non-slip & adjustable straps

🧠100% high-density memory foam

🛋️13.8" x 12" ergonomic size

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Description

🖤 Sit Smart, Feel Elite — Elevate Your Posture Game!

DURABLE MEMORY FOAM - SGS-certified high-density foam quickly regains shape, resisting flattening over time.
SECURE STABLE FIT - Non-slip bottom and dual adjustable straps keep cushions perfectly positioned on any chair.
TAILBONE PRESSURE RELIEF - U-shaped cutout suspends your coccyx, eliminating numbness and pain during long sits.
FULL SPINE LUMBAR SUPPORT - Anatomically contoured pillow supports upper, middle, and lower back for all-day comfort.
VERSATILE COMFORT ANYWHERE - Ideal for office, car, gaming, or airplane seats—your go-to relief for back, tailbone, and sciatic pain.

The SAIREIDER Seat Cushion and Lumbar Support Pillow set combines premium 100% high-density memory foam with ergonomic design features like a U-shaped tailbone cutout and anatomically shaped lumbar support. Engineered to relieve back, tailbone, and sciatic nerve pain, it offers durable comfort with non-slip and adjustable straps for secure placement on office chairs, car seats, and more. Perfect for professionals seeking all-day pain relief and posture improvement.

Specifications

ASIN	B0BLHWZ3VJ
Age Range Description	Adult
Best Sellers Rank	#13,947 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #11 in Lumbar Pillows
Brand	SAIREIDER
Brand Name	SAIREIDER
Coin Variety 1	Lumbar Support,Memory Foam,Seat Cushion
Color	Seat Cushion&lumbar Pillow-black
Customer Reviews	4.4 out of 5 stars 1,900 Reviews
Fabric Type	100% Memory Foam
Fill Material	Memory Foam
Item Dimensions L x W	13.8"L x 12"W
Item Firmness Description	Soft
Item Type Name	Seat Cushion and Lumbar Pillow
Manufacturer	SAIREIDER
Manufacturer Part Number	seat cushion lumbar support-01b
Material Type	Memory Foam
Model Name	Seat Cushion and Back Support Pillow
Model Number	Seat Cushion &Back Support-LS01b
Number of Pieces	1
Pattern	Solid
Product Care Instructions	Machine Wash
Recommended Uses For Product	Car
Shape	Rectangular
Size	Universal dimensions
Special Feature	Adjustable
Special Features	Adjustable
Target Use Body Part	Back, Legs
UPC	342976985661
Unit Count	1 Count

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73826CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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