HAVE NEVER PURCHASED FLANNEL PILLOWCASES BEFORE. THEY ARE VERY COZY. WASHED THEM FIRST AND THEY LEFT LOTS OF LINT IN WASHER AND DRYER.  BUT THINKING IT WONT HAPPEN WITH FUTURE WASHES.  THEY ARE SNUG ON MY STANDARD PILLOWS SO HOPE THEY DON'T SHRINK WITH FURTHER WASHING/DRYING.