These sheets are extremely soft and cozy, so much so that my husband and I have a hard time getting out of bed in the morning!  We have a 17" deep mattress and the fitted sheet is plenty big, in fact, doesn't fit snugly but doesn't shift either so it's fine but would fit an even bigger bed!  Washed them before using, no pilling or shrinking.  Would definitely recommend.  They are not super thick so don't get too hot.  It has been cold here in So. Cal the last few weeks with lots of rain and we use only the top sheet with an all-season comforter and are plenty warm.