I love the feel of these sheets, but at the price we paid for these sheets, I would've expected them to cover my mattress. Our mattress is around 17 inches thick, but the fitted sheet doesn't have enough material to cover it completely, let alone tuck under it on the sides. They are advertised to accommodate today's thicker mattresses, up to 18 inches, but it is not true. I've had other Cariloha sheets (Classic sets) in the past, and didn't have this issue, so I didn't expect this issue with the resort version. I even barely had enough of the top sheet to tuck under my mattress as well. I have a feeling it's going to be a problem keeping them tucked night after night.