Simpurity™ Xeroform Petrolatum Impregnated Dressing, 4 x 4 Inch, 1 Box of 10 Jobst Ultrasheer Thigh Hi 8 15 6 month limited warranty on cover Ships via truck 6 month limited warranty on cover Retail boxed * Memory Foam * Blue cover * Ergonomically designed to provide ideal spinal alignment and a therapeutic sleep posture to reduce head neck shoulder and back discomfort * Can also be used under the back knees or ankles * The high quality memory foam reacts fast to provide instant relief and comfort and provides slow memory foam recovery for longer support * The removable soft polyester and rayon cover zips off easily for machine washing * Hypo allergenic * Conforms to body Easy removal