The foam, after more than 48 hours, is only 2" thick. The "Pillow Top Down Alternative Topper" is not filled all the way and is only about 1/2" thick in reality and makes little difference to the overall softness-squishiness of the product. If the topper were actually full (as you can see in my photo) it would be 2" thick and would actually total the 4" described. So, it's not actually 4". That being said, it added enough "squish" to my overly firm, foam mattress, so it works okay for me. Not as great as I hoped.

I’ve only had it a few days but it’s great so far. The first day I had it, I took the top part to a laundromat and put it in an XL dryer and I think that really helped puff it up and soften it

Great topper! More on the stiff side which is what we were looking for!

Love it! Really great value for something that is ordinarily very pricey when purchasing the two pieces separately. I wish more retailers would combine things like this!

Wonderful product, I love the combo of the foam pad and pillow top mattress topper.

Perfect topper for my sons twin xl dorm bed.

My very firm mattress was causing issues with my lower back and hips, but I couldn't afford to buy a new one. A friend suggested this foam mattress topper and it's done it's job beautifully. Have had this for awhile now and am still happy with it. Less expensive than a new mattress and can still use the same size fitted sheets!

This mattress topper is EVERYTHING you've ever wanted in comfort!! The Gel memory foam combined with the down mattress cover seriously makes you not want to get out of bed!!! We originally put it on our old mattress, which was OLD and it STILL made it comfortable, we've since replaced the mattress and now it's perfect!! Unlike many mattress toppers, these do not break down easily at all, you can see them retaking shape after you get out of bed, which I appreciated because ones I've had in the past did not. Definitely would recommend this to anyone wanting to purchase a quality mattress topper!!!

Very comfortable. I am a side sleeper, no more hip pain! Very happy with purchase.

As a person who suffers from severe insomnia, I HIGHLY recommend this mattress topper! I've had the best sleep of my life since I got this, no joke.