Close your eyes, think of relaxing into that stage of NREM sleep; the one where your body repairs itself [SEP] My daughter has tried these so far and says they feel good.  I know from first hand experience that the Pearl style gel products are very rigid concerning their warming times, and these are a little better and have cool and warm inserts, with the aroma scented pieces that can be worn on either side.  So far several weeks now and liking them.<br /><br />Seems to help reaching all the known stages of the sleep cycle. . . . or just resting and relaxing.<br /><br />We do recommend this product and only wish they included a washable zippered pouch for all that comes with them.