I am a side sleeper against my will, and always need something between my knees. Bought this pillow without much research figuring the price was great and I love Macy's so why not. Wow. It is truly extra firm yet soft! I have had it quite a while and it's still plump as can be but softly enveloping of any weight, and as soon as I turn on my side and put it between my knees I am OUT LIKE A LIGHT! The size is substantial which allows me to keep it in place and gain deep sleep. I will buy this again in a heartbeat. Wonderful leg support.