The Spoonk Mat works on the simple principle of acupressure - the healing art known as the Shiatsu massage. By stimulating increased circulation with 6210 acupressure points on problematic areas, you relieve muscle tension and pain, while at the same time rejuvenating and rebalancing the whole body. The stimulation points are made with high quality, non-toxic, hypoallergenic ABS plastic. Spoonk is the only brand that uses plant based, USA-made, CertiPur-US Eco-foam-free from PBDE flame retardants and made using VPF technology. Our fabric is GOTS certified (Global Organic Textile Standard) and 100% cotton. new $40-$50 on Amazon Includes carry bag with hook to hang if desired. Great pre-owned condition!