I've been really loving my new MOLECULE Gel Memory Foam Pillows ever since I got them.  It's hard to describe the gel factor, but the outside white zippered pillowcase has a second zippered pillowcase inside which contains the shredded memory foam material.  The packaging suggests removing or adding some of the shredded foam to make the pillow as soft or firm as you like. I didn't bother because they both felt great to me; everytime I tried one out, I nearly took a nap!  I think pillows can be a difficult item to buy without seeing and feeling it, and I can attest that the stuffing material has a unique ability to adjust the firmness, and also to help cool the pillow by diffusing heat out through the "gel memory foam" pieces (certainly better than traditional cotton stuffing).  This pillow stands above most others I've tried over the years and certainly has the newest technology in pillow comfort.