is it good for semi drivers?

If I may interject, if you are 200 lbs plus then this is likely going to be a good fit. I am and ex-driver I have found this to be a factor to my worsening pressure points in my legs and sciatica. Those of us that for what ever reason (genetics or exercise) maintain a weight under 200lbs would greatly benefit from the Double Cushion link provided below. I bought my son who is 100 pounds wet lol the double and I decided to give his a try after having negative response to the "Ultimate". Don't get me wrong, the Ultimate is the best for those who are much heavier or have a larger caboose in tow, but for light more narrower individuals as myself (@176-198lbs -/+ seasonally lol), it's overkill and actually makes the matter worse in respect to pain and comfort. If you fall into this category please get the Double, you will not regret it and you'll save a few bucks too. I have used the Ultimate for 2 years+ and it's still like new which is testament to its durability. I promise you, I would not have taken the time to write this if I didn't know what I was talking about from personal experience both OTR and @ Home Office during the transitions. God Bless https://www.amazon.com/Purple-Double-Seat-Cushion-Relieving/dp/B01CKMP406/ref=sr_1_2_sspa?crid=3QR3DBTS1S9AV&dchild=1&keywords=purple+double+seat+cushion+for+office+chair&qid=1630173092&sprefix=purple+doub%2Caps%2C455&sr=8-2-spons&psc=1&smid=A39Q3A3D4B6005&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFHN1pTTEExOUkwRjUmZW5jcnlwdGVkSWQ9QTA5OTQ0MTAxSDFIWElRTE01VEpSJmVuY3J5cHRlZEFkSWQ9QTA5NTM1NjMyNEc3OFhYTVk0MjQ0JndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Which is better for pressure sores? The double or the ultimate?

If I may interject, if you are 200 lbs plus then this is likely going to be a good fit. I am and ex-driver I have found this to be a factor to my worsening pressure points in my legs and sciatica. Those of us that for what ever reason (genetics or exercise) maintain a weight under 200lbs would greatly benefit from the Double Cushion link provided below. I bought my son who is 100 pounds wet lol the double and I decided to give his a try after having negative response to the "Ultimate". Don't get me wrong, the Ultimate is the best for those who are much heavier or have a larger caboose in tow, but for light more narrower individuals as myself (@176-198lbs -/+ seasonally lol), it's overkill and actually makes the matter worse in respect to pain and comfort. If you fall into this category please get the Double, you will not regret it and you'll save a few bucks too. I have used the Ultimate for 2 years+ and it's still like new which is testament to its durability. I promise you, I would not have taken the time to write this if I didn't know what I was talking about from personal experience both OTR and @ Home Office during the transitions. God Bless https://www.amazon.com/Purple-Double-Seat-Cushion-Relieving/dp/B01CKMP406/ref=sr_1_2_sspa?crid=3QR3DBTS1S9AV&dchild=1&keywords=purple+double+seat+cushion+for+office+chair&qid=1630173092&sprefix=purple+doub%2Caps%2C455&sr=8-2-spons&psc=1&smid=A39Q3A3D4B6005&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFHN1pTTEExOUkwRjUmZW5jcnlwdGVkSWQ9QTA5OTQ0MTAxSDFIWElRTE01VEpSJmVuY3J5cHRlZEFkSWQ9QTA5NTM1NjMyNEc3OFhYTVk0MjQ0JndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

ASIN	B01CKMP21W
Age Range (Description)	Adult
Age Range Description	Adult
Brand	Purple
Coin Variety 1	Seat Cushion
Colour	Ultimate
Customer Reviews	4.4 out of 5 stars 3,032 Reviews
Item Dimensions L x W	55.9L x 45.7W Centimeters
Item Firmness Description	Firm
Item Type Name	seat cushion
Item Weight	2.49 Pounds
Manufacturer	purple
Number of Pieces	1
Pattern	Solid
Product Care Instructions	Machine Wash
Recommended Uses For Product	Car
Shape	Wedge
Size	Ultimate
Special Feature	Extra Wide
Special Features	Extra Wide
Target Use Body Part	Back
UPC	757183928286 815068012564
Unit Count	1.0 Count

Purple Ultimate Seat Cushion - Seat Cushion for The Car Or Office Chair - Can Help in Relieving Back Pain & Sciatica Pain

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