They are definitely stretchy, and they fit the purple mattress very well. Super soft, and they even help keep you a little cooler. You might not notice it, but it's definitely doing it's job, so you don't overheat at the night time.

We thought they were going to keep you nice and cool but turned to make you more hot. On a brighter note they are very comfortable and I'm sure they will keep you nice and warm in the winter. Not good as promised for the hot season though.

These sheets really are life-changing! They are soft, cool, and NEVER slip off the mattress! My fiancé and I tested this pair out, and bought two more pairs the next morning. Best sheets ever!

This mattress is incredibly supportive and soft. We are very glad we got the sheet set to go with this mattress since I don't think there are sheets that would be able to accommodate the mattress otherwise.

The sheets are huge and don't fit. I'm still waiting for approval to return. Purple refuses to admit the sheets are defective, I will never buy something from them again. To return an item is such a hassle. Buyer beware.

The sheets have pilled and the bottom sheet is not stretchy at all. The quality of the fitted sheet feels poor and not comparable to the top sheet. Wish I had a better experience.

I am not one to spend a lot of money on, well really anything. These sheets were a splurge for me but I did not regret it for one second because they are the best thing ever.

Frustrated to find these sheets a soft lilac, not even close to off-white. I have them in gray and they are the best Tencel sheets around. Heavy-duty elastic, wrinkle-free, super, super soft. Too bad they couldn't nail the white.

These sheets are so soft and cool on my skin. The thickness is perfect as a light blanket, yet couples well with another cover. Even the color is soothing.

We had trouble with our motorized base with the sheets always coming off. Have not had the problem with these sheets at all. Very comfortable and soft.