Adjustable King Pillow - SmartSOFT Memory Foam - Original Bamboo Pillowcase - Hypoallergenic - Supports Neck Back & Head - Shredded Design ADJUSTABLE ZIPPER: Personalize your pillow with our unique, adjustable zipper! We generously fill each pillow with our premium bamboo blend and protect it with our with our world-famous pillowcase that opens on one end allowing you to adjust the amount of filling! To reduce the filling simply unzip your pillowcase and remove excess memory foam, before closing your zipper and sleeping! SmartSOFT MEMORY FOAM: Original Bamboos Pillows are engineered with premium, shredded memory foam that is designed to grow and expand when exposed to air & heat. To activate your memory foam SmartSOFT foam, simply toss it in the dryer for 10-15 minutes on low! HIGHLY RECOMMENDED: Original Bamboo worked with the sleeping specialists, to design our SmartSOFT Memory Foam. We designed it to personally conform around the contours of your head neck and shoulders, providing ultimate support. WORLD-FAMOUS PILLOWCASE: Original Bamboo engineered the ultimate hypoallergenic, self-cooling pillowcase with our unique Bamboo Blend. Our climate sensitive pillowcase adapts to your body heat providing you with the coolest pillow in all conditions, while enhancing circulation & air flow! HYPOALLERGENIC DESIGN: Our increased circulation & air flow provided by our SmartSOFT memory foam and world famous pillowcases significantly reduce the accumulation of dust, dirt, germs, moisture, & other contaminants from attaching from your pillow. Sleep smart, fresh, & clean to help your sleep!