Do you need an additional back support for road trip travel with this? Another piece to go against the seat?

I found that this was good enough, especially if you keep a little space between the backrest of chair and cushion. It kind of nestles you in. Also, if you use this AND a back support, there might be too many items on the seat, thus affecting your actual seating room. If you have back problems, Id just go with a back support and no seat cushion. 2cents.

Is this suitable for larger people or does it flatten out?

I am 190 lbs, weight has been fairly constant. My career choice finds me sitting in a chair in front of computer screens for very long days (40-60 hours per week) year round. I purchased this cushion in March of 2019. It is now January 2022. Thinking I might get a new cushion. The front of the cushion is now flattened to 1 1/2 inches from seam to seam in center of each thigh segment. The back is still at 2" and does provide some support (measured when I got up from seat after sitting continuously for an hour). Overall, I feel the support is weakening and this cushion should be replaced. It's been just short of three years, which is beyond satisfactory for the cost and benefits provided.

Do you have any certificates for this cushion?

I did not receive any certificates

Can you tell me the dimensions of this; I'm looking for a cushion that will fit the bucket seat of my Chevy Cruz, so nothing more than 12" to 13" wide

Sure. I measured about 17 1/2 wide, 14 long. Looks like it would be too wide :(

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Premium Comfort Seat Cushion - Non-Slip Orthopedic 100% Memory Foam Coccyx Cushion for Tailbone Pain - Cushion for Office Chair Car Seat - Back Pain & Sciatica Relief (Gray)

Premium Comfort Seat Cushion - Non-Slip Orthopedic 100% Memory Foam Coccyx Cushion for Tailbone Pain - Cushion for Office Chair Car Seat - Back Pain & Sciatica Relief (Gray)

Product ID: 253871612

Details

Brand
ComfiLife
Colour
Gray
Fill material
Memory Foam
Size
Special features
Lightweight

🚗Non-slip base for stability on any seat

🧠100% Memory Foam for adaptive comfort

🛋️Ergonomic U-shaped design for tailbone relief

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COP 678768

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💺 Sit Smart, Feel Elite — Your Back’s New Best Friend

STAY PUT STABILITY - Non-slip rubber base ensures the cushion stays firmly in place, no matter how active your day gets.
EFFORTLESS MAINTENANCE - Machine washable cover keeps your cushion fresh and ready for daily use without hassle.
TAILORED TAILBONE RELIEF - Ergonomic U-shaped cutout reduces pressure and promotes healthy posture during long sitting sessions.
ANYWHERE ANYTIME COMFORT - Lightweight and portable design fits office chairs, car seats, airplanes, and wheelchairs for on-the-go relief.
ADAPTIVE MEMORY FOAM COMFORT - Premium 100% memory foam contours perfectly to your body, delivering personalized support and pain relief.

The Premium Comfort Seat Cushion by ComfiLife features a 100% memory foam core with an ergonomic U-shaped design that alleviates tailbone pressure and supports healthy posture. Its non-slip base ensures stability across various seating surfaces, making it ideal for office, car, and travel use. Lightweight, portable, and machine washable, this cushion is engineered to provide targeted relief from back pain, sciatica, and related discomforts, backed by a lifetime warranty.

Specifications

ASIN	B010TLSFA6
Age Range Description	Adult
Best Sellers Rank	#24,631 in Home ( See Top 100 in Home ) #149 in Home Office Back Cushions & Seat Cushions
Brand Name	ComfiLife
Coin Variety 1	Memory Foam,Seat Cushion
Color	Gray
Customer Reviews	4.4 4.4 out of 5 stars (21,536)
Fabric Type	Rubber,velour
Fill Material	Memory Foam
Item Dimensions L x W	44.5L x 34.8W centimeters
Item Firmness Description	Soft
Item Weight	1.3 Pounds
Manufacturer	ComfiLife
Manufacturer Part Number	B010TLSFA6
Manufacturer Warranty Description	Lifetime Warranty
Material Features	Non Slip
Material Type	Memory Foam
Material Type Free	BPA Free
Model Number	SYNCHKG080643
Number of Pieces	1
Pattern	Solid
Product Care Instructions	Machine Wash
Recommended Uses For Product	Office, Car
Shape	Semicircular
Size	17.7Lx13.7Wx2.8H
Special Features	Lightweight, Portable, Washable
Target Use Body Part	Back
UPC	703510477934
Unit Count	1 Count

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