I have one of those beds that you can raise the head and feet with a really thick mattress and these sheets are the only freaking sheets that I've ever had that don't come off at least once a day! I've been using them for a month or 2 at this point and have not had them come off even 1 time! I was hesitant to spend this kind of money on them but I'm so happy I did.We have a king adjustable bed and other sheets always come off when we raise the head of the bed but these stay put!! We just put them on so haven’t changed them yet so we don’t know how easy it will be to unzip, wash them and zip them back on. I wish they came with a matching top sheet but we use one from our old sheet set. Love these sheets!I struggled as a child and teenager while living at my parents house to make a bed. When I was that age I figured there's got to be something better than the annoying fitted sheet that pops off and is a pain in the butt to get on, something that zips up, or something. While setting up my new place I wanted to start fresh. I did some research and found these. I dont care how expensive they are, they are a game changer. I ordered the fitted from here and the zip up duvet and extras from their website. I have a queen, just not finished with the room yet. I chose their grey duvet (I need to get a comforter for inside the duvet) and their white sheets to match.We have a king size adjustable bed and have had a rough time with sheets falling off. These work well in combination with the bed scrunchie. Quick easy changing without having to reset the bed scrunchie at every wash. A bit of an investment but I can wash the bedding more frequently and my sheets never fall off.Easy to use.I have 3 adjustable beds and have tried everything to keep sheets on ….these are the only ones that have worked and are super easy to change and incredibly soft. Only digestion I have is that they should come with one top sheet in the same fabricI love how this sheet system works. So easy to change a bottom fitted sheet with the large heavy mattress I have. Also stays tucked all night.Just beware this system comes with two zippered bottom sheets but NO top sheet.Ok so I admit maybe I didn’t understand what I was getting but here is what I was looking for.I have an adjustable bed and anyone knows with adjustable beds the sheets come off and slide everywhere as you raise and lower the bed and sit in it etc. so I wanted sheets that covered the mattress completely-top, bottom, over and under. When I saw this I thought that this was it and you just zip off the top to wash it but the underneath and sides always stay on.This is not the case. This is just a deep pocket fitted sheet with a zip off top. I personally don’t understand it myself. If the sheet comes off the bed so easily then why do you need a zip off top??? And why so expensive. I thought the extra price was the extra fabric for the underneath plus the zipper but apparently not.Well with that said, it does stay put pretty well on my adjustable bed. I haven’t had to fix it from falling off once since I got it in last three weeks. That’s a lot considering it was a daily occurrence before. The sheets are comfortable and it comes with an extra top so when you zip one off the other clean on can be put back on. It’s comfortable and thick sheet. Def heavy duty quality. I’m giving it a 4 star because it wasn’t what I expected but it sorta got the job done and it’s a quality product.I love the idea and they do exactly what they say, my only negative is that after only 2 washes the sheets started to pill which when you spend $250 is not acceptable,I would love to contact company but can’t find their detailsPurchased these for our adjustable bed. The sheets are so soft and comfortable and I plan to buy more as needed.They are amazing, very good quality fabric and so easy to change the sheet quickly.Great for my adult daughter who has Autism - helps her keep sheets on her bed and change them with ease.