Elastic Knee Stabilizer Beige X Large 16.5 18 Foam Mattresses Easy one touch operation * Compact Undercast Padding Easy one touch operation * Compact and lightweight * One year battery and three year compressor warranty * Fast treatment time about 10 minutes * 45 minute battery life * The 4 hour battery charge time * Includes Compressor Unit Battery Reusable nebulizer with tubing Disposable nebulizer 5 replacement air filters and filter door Tubing adapter Adult and pediatric masks AC adapter DC car adapter Carrying case Instructional manual & DVD * Two way stretch top enables the cushion cells to conform to the individual's body shape without diminishing product effectiveness or therapeutic value * The cover has a two way 100% Polyester top material that is a durable heavyweight fabric with a soft feel * The side material is composed of a 3 layered knit spacer fabric which provides superior air circulation that ventilates and cools the user * The fluid proof solid non skid base material offers a durable easy to clean surface * The cover has the added feature of Velcro© straps placed on the bottom to allow the user to attach the cushion to their chair * Encased foam is stitched to the cover for added comfort around the leg trough areas * Cover is machine washable * Weight: 1 5 18 (measurement taken just under the knee cap while knee is slightly bent) * Elastic Support for Prevention Treatment & Rehabilitation of the knee * Thermoskin elastics can expand contract and stretch and are made of a high grade durable material that permits a full range of movement and are comfortable to wear during a range of activities * Anatomically designed the elastic support will comfortably contour to the shape of your knee * It provides even compression and support to weakened and injured knees * It has side stabilizers to provide increased medial and laterial support X Large * Fits knee circum