Cover:48% Rayon Derived from Bamboo,52% Polyester [QUALITY FIRST] SORMAG 2 pack pillows for sleeping are filled with CertiPUR-US certified memory foam, 52% upgrade Polyester and 48% Bamboo fiber. Mother-infant Level material pillowcase. All materials we used are striving for high safety and quality. Nice sleeping pillow in your life. [WONDERFUL MEMORY FOAM] Our 50D high-density space memory foam pillow has a health care function, which perfectly fits the human body curve and is suitable for people with poor sleep quality. Perfect neck support for back, stomach, side Sleepers. Kick neck pain, stiff shoulders and headaches out . [SUPPORTIVE AND COMFORTABLE] No-shift and never goes flat, most supportive of all kind of sleeping positions. Breathable Bamboo fiber, cross-cut memory foam and mesh design pillowcase. Most comfortable and cooling pillow , you will no longer be awakened by sweat. [ADJUSTABLE AND WASHCBLE] Adding or removing foam fillings to adjust the height, softness and firmness for the bed pillow. Pillowcase are detachable and washable, no more dirty, and you don’t have to buy new pillowcase for it. [BE ASSURED ] If you don't fall in love within 90 nights (although we're sure you will),we appreciate your effort in bringing this issue to our attention . We're always here to help!