UNIQUE 4 HEIGHTS SUIT ALL SLEEPERS Our neck pillow has four layers to customize your own pillow It comes in a king size of 33x142 You can customize 4 different combinations of layers which create four heights such as 12 24 36 and 48 Try to find just right position to relieve your neck or back pain whatever you are stomach sleepers side sleepers or back sleepers WHY SHOULD YOU CHOOSE OUR PILLOW Dont settle for too soft foam providing no support We use premium medium firm memory foam certified by CertiPURUS which provides superior support for your neck and head It is durable and safe Say goodbye to neck pain INNER PILLOWCASE FOR LONGER SERVICE LIFE Each layer of memory foam is equipped with an inner pillowcase which can protect the memory foam from being torn while adjusting the side sleeper pillow It is very convenient to adjust the memory foam neck pillow with the inner case It can prevent memory foam layers from sticking together MACHINE WASHABLE COVER Included is a removable and machine washable cover This super soft material60 polyester 40 rayon derived from bamboo is hypoallergenic and breathable which can wick away moisture and help you feel not too hot Our neck support pillow has ventilation holes to help alleviate excessive heat buildup USING IT AT A ROOM OF IDEAL TEMPERATURE FOR PROPER SOFTNESS The softnessfirmness of the memory foam is affected by ambient temperature We recommend keeping the memory foam at a room temperature of 15 to 20 degrees for a period of time to achieve the ideal softness EXPLANATION OF MEMORY FOAMS ODOR When you open the package the pillow may still have a foamy smell because we packaged it quickly after producing Our memory foam is certified by CertiPURUS Using the pillow directly is not harmful If you really mind it You can take the pillow core out of the pillowcase and let it air out for 2 days or wash the pillowcase This smell will fade away