I don't write many reviews unless I'm genuinely impressed. I couldn't believe 3" could pack this much punch.We had a flood and lost everything a few months ago. I bought some mattresses on fb marketplace-no returns. And discovered they were all spring mattresses and were terribly uncomfortable.I rushed to find toppers as quickly as possible to attempt to make the kids more comfortable in the new house.I did not read reviews, I just bought based on what seemed reasonable pricing...and man did I get LUCKY.The day we opened it we lost power. I opened it to "rise" about 8 hrs before. (VERY thin at first, had me nervous) First night in the new house. Kids were scared, and it was 85 degrees by bedtime.I dragged the topper into the master to share the room with them and it's been here 4 days. Because it's that comfortable the kids haven't left my room.....which I'm ok with as it gives me time to put their new rooms together.The topper is so secure on its own, I was able sleep all of us comfortably on a full size topper bare bones on the floor. It's soft, yet supportive.Furthermore, My king mattress got here 2 days ago and the damn bed swallows you whole. Its like sleeping on a cotton ball-terrible. So my husband said "let's drag the kids topper up here and see how it works"And it was a game changer. About to buy the linsy king size Firm topper!Even at moderate firmness the full topper offered an insane difference in support on our sunken, but new, king mattress. We were literally shocked. Without being strapped down even.We also decided to buy one for camping since it does so well on the ground. And it can be vacuumed into a small container. Website said 24-48 hours to fluff, but for us it fluffed in 8-12 to be slept on comfortably, and Fully fluffed in 24. So it'll be an excellent addition to our tent camping weekends in the mountains.Only flaw-is a MINOR design flaw. Something I'm sure I could adjust with some time.The exterior seem of the cover doesn't quite line up with the sides of the topper. As pictured. I haven't tried to play alot of tug of War to straighten out as it doesn't affect the function, or the way it settles on my sons actual mattress. Nor noticeable when I add the mattress protector and sheets.Also positive notation Despite being 85 degrees in the house- no joke---- we stayed surprisingly cool on the mattress. Which is HUGE.Mattress Straps seem stitched well, but we haven't needed it on my sons mattress, as it stays in place just fine without it.Competitor prices are DOUBLE...and more for the same quality.If I hadn't randomly purchased a linsy I wouldve bought a far more expensive topper for my king bed.I will make sure to refer this brand to anyone who will listen...it has surprisingly few purchases/reviews compared to its competitors. But high ratings worthy of its quality and price.Oh yeah- couple more things. While it contours to your body while sleeping(yet my butt and head never hit the floor).. it quickly bounces back to the original shape. I've since read reviews on linsy and other brands and have heard people generally claim they don't bounce back. But within minutes of getting up it fluffed back to what it was. Also termperpedic style filling where you can't feel someone moving around and it stays put surprisingly well. I don't slip and slide off.Lastly we all have sensitive skin and my youngest is immunocompramised. Tons of allergies, and we havent had any skin or breathing reactions to this topper or its cover!Definitely worth every penny. Probably worth more. Grab it at this amazing price before they realize how much it's actually worth. LolThank you LINSY for a quality comfortable clean, and hypoallergenic product.You are actually supplying a product that is exactly as advertized and that alone is worth 5 stars.Combined weight of all sleepers is about 600 lbs spread out, heaviest person is 180.