VERY Hard and Very Thick.  I tired to get used tot his pillow but I had too much neck pain.  After about a week both my husband and I had to remove over 1/2 the stuffing to make it a reasonable pillow to sleep on.  We had the older pillows with the white bamboo fiber fill that were SO comfortable.  I actually tore that one open and mixed the fiber and the foam from this pillow to make a really comfortable pillow!