MediCrystal Classic Amethyst Tourmaline FIR Mat

Gemstones:  Crushed and Polished Natural Purple Amethyst and Black Tourmaline. Half-and-Half ratio. Surface: Sweat Resistant Artificial human-made Red-Violet Suede and Heat Stable PU film Features: HEATING, CRYSTAL RAYS, NEGATIVE IONS, FIR (FAR INFRARED) Sizes:   20"x32" (50x80 cm) Mini 20"x40" (50x100 cm) Chair Mat with Two Straps  22"x48" (55x120 cm) Compact Mat  24"x60" (60x150 cm) Midsize Mat  24"x72" (60x180 cm) Full-size Mat  31"x72" (80x180 cm) Professional Mat  39"x75" (100x190 cm) Single Size Mat 75"x79" (190x200 cm) King Size Mat  Voltage:  Please make sure you buy the right voltage! We have two product lines for different countries. Details: The mat is made with 50% of 2-7 mm Amethyst gems from Brazil and 50% of natural Black Tourmaline from China. The warm stones naturally release negative ions and far infrared deep impact heat, providing various health benefits. Amethyst concentrates crystal rays in the most absorbable wavelength range of 4-16µm with e