SoftTop™ Pillow BladderThe Zenbivy SoftTop Pillow Bladder provides the support and height adjustment that down only pillows lack. Inflate or deflate to dial in your ideal pillow height and level of support. Built in dark 20D polyester taffeta, its lightweight, durable, and sleek. Designed to pair seamlessly with the SoftTop Pillowcase and topper, it delivers stable, customizable support at minimal weightso you can sleep comfortably wherever you camp.