Pro Series™ 370 Econo Blend™ Blue Ice Melter Tough on ice, easy on your budget Safe Step Pro Series 370 Econo Blend Blue combines the convenience of high-visibility crystals, the ice melting power that’s made Safe Step an industry leader, and at a very affordable price. Safe Step Pro Series 370 Econo Blend Blue combines the power of magnesium chloride and sodium chloride to melt ice quickly and efficiently. The high-visibility blue crystals help achieve an even and efficient application, saving both time and money. Available in 50 lb. poly bags.