Extra LongWide Size Thicker20x13x5 This really helps hip and leg pain Unlike other pillows that only support your kneeHOMBYS knee pillow is long enough to provide support of the entire lower leg from knee to ankle The divotseam down the middle makes it easier to keep your leg in place and to switch sides without struggling to rearrange the pillow Special Grooves DesignedUnlike other normal knee pillow we designed this groove for you to place your legs the centre is recessed so that your legs dont slide so much that they come off the pillow providing a fixed support without the need for any straps to bind your legs heavy straps tightly against your legs may make you feel hot and sweaty Relaxing the Body for Sound Sleep This one is great as you can put it under your knees when on your back and then very easily shift it to between your knees when you roll over to your side Its much easier and more versatile than the wedges that are made only for under your knees or between your knees Great for side or back sleepersIt has helped your back stay aligned and knees elevated as well as to not get sore without oneThis will separate your legs and let your foot rest on top to keep them from getting tangled up This pillow is also the right thickness not too thick that it gets in the way but just thick enough that it provides enough cushioning and separates the knees when lying on your side TipsThis pillow comes in a compressed bag and has been transported over a long period of time When you receive it it will be in a flat state take it out and leave it for 48 hours and it will expand to the desired height 100 Cotton Shell100 Down Alternative Microfiber Fillingsoft to the touch the batting inside is stuffed to perfection and the design is well thought out Soft Breathable 100 Cotton Shell100 Down Alternative Microfiber Fillingsoft to the touch the batting inside is stuffed to perfection and the design is well thought outExtremely breathable soft and comfortableBaffle box construction keeps the filling evenly distributed and wont clumped after washingPiping edge adds a decorative finish to the pillow and makes it more durable