I decided to learn if this was different than using a pillow under my pelvis, and it is! The firm foam is encased in two removable, washable covers: one that is more decorative and one that appears to be nylon or waterproof. This photo is at an angle so you can see the wedge. When it is facing you, it is wider. The wedge can be used for front or rear entry. No, there are no instructions on how to use it but, there is a photo on the removable tag. That photo addresses rear entry. For front entry, have the point of the heart facing you. It tilts you up and supports your back. I have lower back problems and this allowed me to enjoy myself without being in pain afterward. I used a regular pillow under my head to ease neck strain. It also made it easier on my arms, which used to get exhausted before the rest of me was! I decided to try it out with a glass wand that wasn't pleasuring me as much as my other ones in order to compare. It really did the trick! I can't wait to try it out with my other ones!