Thermochromic is exclusive to “M-OJO RISIN” and is a special treatment with pigments that change color when exposed to heat and turn back to their original color when the temperature drops again. These thermochromic colors are based on liquid crystal technology. At specific temperatures the liquid crystal transform to produce an apparent change of color. Materials: 100% Cotton Washing Instructions: DO NOT DRY CLEAN. Hand wash cold or delicate in washer, hang dry. MADE IN ITALY