Knee pillows are mainly classified based on their shapes or the materials used. You can get the following shapes in these pillows:
Heart=shaped
As the name indicates, the heart-shaped knee pillow is shaped like a heart and may or may not have straps for securing your legs during sleep. This shape is recommended for people suffering from back, knee, leg, hip, joint, and sciatica nerve pain. It is also recommended for pregnant women and supports multiple sleep positions.
Heart-shaped knee pillows support the legs, knees, and back, and correct the spine’s natural alignment to improve sleep posture.
Semi-roll shaped
The best part about the semi-roll=shaped pillow is that it can be even used under the neck and not just between the knees. Moreover, it also supports leg and foot elevation in case you have to elevate them to reduce edema or swelling.
Roll-shaped bolster pillows are also recommended for back and side sleepers and can be used to support the back, lumbar region, hips, knees, joints, spine, neck, head, and for relief from sciatica pain.
Wedge-shaped
The wedge-shaped knee pillow can be useful for correcting sleep posture. It also relieves pain caused by arthritis, back, knee, hip, joint, post-surgical pain, injury-related pain, athletic or workout pain relief, pregnancy, etc. The wedge pillow supports the natural curve of the back and corrects spinal alignment to improve posture.
Memory foam
Most knee pillows come with memory foam filling that supports natural body contours. They retain their shape despite how you use them.
Gel-filled
Gel-filled pillows are especially beneficial for inflammatory and painful conditions like arthritis, post-surgical pain relief, knee-replacement patients, sciatica sufferers, etc. The hypoallergenic, non-toxic gel diffuses body heat and cools the skin to relieve pain.