Here are some of the major ways in which one-piece and shredded memory foam pillows differ:
Customization: Both one-piece and shredded memory foam pillows can be customized to a certain extent. Shredded memory foam pillows frequently have a zipper that allows users to open the pillow and add or remove filling to adjust the loft. It’s a good idea to hang on to the filling in case you ever want to make the pillow higher. Although not customizable to the same extent as shredded memory foam pillows, one-piece pillows sometimes have removable inserts that give users several choices of loft.
Moldability: Shredded memory foam pillows have a significant advantage over one-piece pillows in that they can be molded to virtually any shape. This is highly convenient for people who like to use their pillow in different positions.
Weight: Memory foam pillows weigh more than fiberfill or down equivalents, with many weighing 5 pounds or more. By design, shredded memory foam weighs less than the equivalent volume in solid foam.
Heat Retention: Shredded memory foam pillows generally maintain a more neutral temperature, since the design leaves room for airflow between the pieces. That said, some one-piece memory foam pillows feature ventilation or cut-out channels that allow air to flow freely and carry heat away.
Fluffing: One-piece memory foam pillows are low-maintenance and don’t need to be fluffed. Shredded memory foam pillows can become lumpy if not regularly fluffed, but the advantage of shredded pillows is that many of them can be machine-washed.
Support: One-piece memory foam pillows are usually firmer and keep their shape better than shredded memory foam pillows, which may need to be readjusted every time you switch positions.