Deluxe Full Spine Posture Pump® Model 4100 Combines both Neck & Back Exercisers into one. Leatherette comfort pad attaches both exercisers and conveniently folds and locks together for easy travel Leatherette comfort pad is designed to stretch and fit all body types A must have for sufferers of Neck and Back stiffness and discomfort (Leatherette comfort pad is also sold separately & easily connects to existing Neck & Back Exercisers.) Leatherette comfort Pad (Model 3100) Prices do not include a fee for evaluation and training by a health care professional. The manufacturer highly recommends that you contact a health care professional and receive personal evaluation and training on the use of all Posture Pump® products. In all cases, a health care professional should be consulted before beginning any exercise program.