I am so happy to have found these sheets.  We have a king size sleep number bed and I was worried about the sheets popping off when the bed was raised but they stayed secure.  The sheets are substantial and soft, comfortable against the skin.  I would definitely buy these again and I do recommend them.  I have only washed them once but there were no loose thread or pilling.  From the feel of them I think they will do well over future washings