The Mat designed to make pressure adjustment simple and easy, the Bed of Nails is similar to acupuncture; the pressure of the rounded nails against the skin may help the body release endorphins, the bodys very own happiness drug which provides a sense of joy, energy and pain relief, and oxytocin, which makes you calm and relaxed (yes, it is possible to feel energetic and be relaxed at the same time!). Everybody reacts differently to acupressure, and the effects may even vary from time to time; you may feel sleepy, alert, relaxed, happy and a clearer mind. Acupressure may also help the body rid itself of toxins, so it is important to drink water after using the Bed of Nails.Dimensions: 28.5 x 16.5 x 1″ (74 x 41 x 2 cm)Comes with a carrying bag.