Because I can't get the support I need for side-sleeping on the Sleepgram pillow even with both inner pillows loaded inside, I tend to prefer stomach-sleeping when I use it. The instruction booklet that comes with the pillow says that the inner pillow with the blue tag is softer than the one with the red tag, so you can get different firmness levels by keeping different configurations of the two inner pillows. Sleepgram labels one inner pillow with a blue tag and the other with a red tag. I find this to be an advantage for the Sleepgram pillow because it does allow for more configuration options. Nevertheless, the total starting loft is the same across the Sleepgram and Casper pillows as far as I can measure, so the Sleepgram inner pillows are individually thinner than the Casper inner pillow. The Sleepgram pillow has two inner pillows while the Casper pillow only has one. The second difference is the number of inner pillows.

Because of the softness of the Sleepgram pillow, I'm unable to get the support I need for side-sleeping, and this is one of the reasons I wouldn't consider the Sleepgram pillow fully adjustable. The Casper polyester fibers are also soft in terms of firmness, but they aren't as soft in terms of friction. This means that the material appears to move to the side when I lay my head on the pillow. The Sleepgram polyester fibers glide very smoothly against each other, almost like silk strands. I would guess the difference between the Casper and Sleepgram softness comes from the friction in the polyester fibers. Even though the Sleepgram pillow starts at 10 inches of loft by my measurements, my head sinks so far into the pillow that I feel even less support than I get from pillows that start at half that loft. The Casper pillow is already so soft that my head sinks significantly, so I was surprised that the Sleepgram pillow had even less support. Both pillows have the same starting loft, but my head sinks in more when I sleep on the Sleepgram pillow compared to the Casper pillow. The first difference is the softness of the pillows. However, on a closer look, I found three main differences. In fact, when I first unboxed the pillows, I thought they were the same pillow with different logos. The Sleepgram pillow uses a pillow-in-pillow design similar to the Casper pillow. I kept all the inner pillows zipped inside for this picture, so this is how the Sleepgram pillow that I have sleeps in its firmest configuration. My head sinks in significantly when I sleep on the Sleepgram pillow.

Cube pro pillow